The A/D is one and the same (Daniel 12 and Matthew 24). Note the tense He uses, “When you see”.
Why in the world would God in the Flesh give advice to people for something that had already happened centuries before?
You are completely wrong in the first sentence; but your second sentence is revealing. Since you claim to be a literalist, and you insist on the proper tense in Matt 24:15, how do you interpret Matt 24:34?
"Verily I say unto you, This generation shall not pass, till all these things be fulfilled." (Mat 24:34 KJV)
How about these statements Jesus made to his disciples. How do you interpret them?
"But when they persecute you in this city, flee ye into another: for verily I say unto you, Ye shall not have gone over the cities of Israel, till the Son of man be come." (Mat 10:23 KJV)
"For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works. Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom." (Mat 16:27-28 KJV)
>>>Why in the world would God in the Flesh give advice to people for something that had already happened centuries before?<<<
He was warning them that when they saw the holy land occupied by pagan armies, as occurred in Daniel 12 under Antiochus IV, then they should flee. How would they possibly know what Jesus was referring to, if there was no fulfilled prophecy that explained the abomination of desolation?
Compare these same sequences from Matthew, Mark and Luke, and it will be clearer:
"When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:) Then let them which be in Judaea flee into the mountains:" (Mat 24:15-16 KJV)
"But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judaea flee to the mountains:" (Mark 13:14 KJV)
"And when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh. Then let them which are in Judaea flee to the mountains; and let them which are in the midst of it depart out; and let not them that are in the countries enter thereinto." (Luke 21:20-21 KJV)
Philip