The vision of Peter was for the Gentiles. Jesus gave the Apostles the power to loose and bind. They spoke with his authority and decided at the First Council of Jerusalem not to burden the Gentiles with the Law, with a few exceptions (which many Gentiles who claim the name ignore). Teaching that what Jesus taught in Matthew 5 is no longer extant is disobedience and disavowal of Messiah. Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven. For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
I see the sun shining over this little plot of earth. His Word stands and I believe Him. Ye have heard that it was said by them of old time, Thou shalt not commit adultery: 28 But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart. 29 And if thy right eye offend thee, pluck it out, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell. 30 And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell. 31 It hath been said, Whosoever shall put away his wife, let him give her a writing of divorcement: 32 But I say unto you, That whosoever shall put away his wife, saving for the cause of fornication, causeth her to commit adultery: and whosoever shall marry her that is divorced committeth adultery. 33 Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths: 34 But I say unto you, Swear not at all; neither by heaven; for it is God's throne: 35 Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King. 36 Neither shalt thou swear by thy head, because thou canst not make one hair white or black. 37 But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil. 38 Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth: 39 But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also. 40 And if any man will sue thee at the law, and take away thy coat, let him have thy cloak also. 41 And whosoever shall compel thee to go a mile, go with him twain. 42 Give to him that asketh thee, and from him that would borrow of thee turn not thou away. 43 Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. 44 But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; 45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust. 46 For if ye love them which love you, what reward have ye? do not even the publicans the same? 47 And if ye salute your brethren only, what do ye more than others? do not even the publicans so? 48 Be ye therefore perfect, even as your Father which is in heaven is perfect. And when we were come to Jerusalem, the brethren received us gladly. 18And the day following Paul went in with us unto James; and all the elders were present. 19And when he had saluted them, he declared particularly what things God had wrought among the Gentiles by his ministry. 20And when they heard it, they glorified the Lord, and said unto him, Thou seest, brother, how many thousands of Jews there are which believe; and they are all zealous of the law: 21And they are informed of thee, that thou teachest all the Jews which are among the Gentiles to forsake Moses, saying that they ought not to circumcise their children, neither to walk after the customs. 22What is it therefore? the multitude must needs come together: for they will hear that thou art come. 23Do therefore this that we say to thee: We have four men which have a vow on them; 24Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law. 25As touching the Gentiles which believe, we have written and concluded that they observe no such thing, save only that they keep themselves from things offered to idols, and from blood, and from strangled, and from fornication. 26Then Paul took the men, and the next day purifying himself with them entered into the temple, to signify the accomplishment of the days of purification, until that an offering should be offered for every one of them.
Wall posts are fun, but I do have a Bible. If you want to make an argument, it helps to see your work. You have made no argument whatsoever for Gentiles (such as I) being obligated to the full weight of Moses. If in fact you do allow that exemption, then presenting the passage in Matthew 5 as if it were universal in scope is misleading. If it is NOT obligatory on Gentiles, as you seem to admit, then you also admit that, at least for some individuals, what Jesus taught in Matthew 5 is “no longer extant,” and so qualify for your own disapproval as one who has disavowed Messiah.
On the other hand, if you will stand by your limitation of scope to Gentiles, you also concede that Matthew 5 does have limits, and therefore believing Christ when He Himself identifies a limit in time, both in the prediction and the fulfilment, is NOT a disavowal of Messiah, but rather a more complete submission to His authority in recognizing the difference in terms between the Old Covenant and the New.