All sin is forgiven except Blasphemy against the Holy Spirit.
Sin itself is ranked.
The definition of sin is not a Christian definition, but the Law of Moses.
For example, there are many dietary Laws.
Are Christians now relieved of those Laws but no others?
Ham, Shrimp, Catfish, so much more are all forbidden.
Is eating Pork Chops just as much a sin as Coveting your neighbor’s possessions?
So yes, I think there are worse sins than others.
To me, we all sin. All fall short, even after Jesus died and rose.
To me, all Laws are still active. We can’t pick and choose which ones we think are no longer in effect.
I am a sinner. Wish I wasn’t. I’m not perfect, I’m forgiven.
Christians are relieved of dietary laws. Remember Peters vision?
In Matthew 22:36–40, a Pharisee lawyer asked Jeusus “Teacher, which is the great commandment in the Law?” 37 And he said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind. 38 This is the great and first commandment. 39 And a second is like it: You shall love your neighbor as yourself. 40 On these two commandments depend all the Law and the Prophets.”
Christians are not released from obligation to strive to obey the Ten Commandments. As Jesus pointed out, the other eight are predicated on the first two. If we love God, we will not blaspheme, we will love ourselves and our fellow human beings as beloved children of God. We will not murder our brothers and sisters, steal from them, tell lies about them, etc. These and many more things we will not do, and there are many we will do if we love God. True, we are not perfect and fall short of the mark every single day. We fail to refrain from doing and saying unloving things, and we fail to do and say all the loving things we should and fail to do all such good works as God has put in our paths.
As Mom MD pointed out, Christians are not required to follow the Levitical dietary laws. The revelation granted to Peter in a vision in Acts is one proof. The words of Jesus Himself as recorded in the Book of Mark, Chapter 7, is another:
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“Again Jesus called the crowd to him and said, “Listen to me, everyone, and understand this. 15 Nothing outside a person can defile them by going into them. Rather, it is what comes out of a person that defiles them.” [16] [f]
17 After he had left the crowd and entered the house, his disciples asked him about this parable. 18 “Are you so dull?” he asked. “Don’t you see that nothing that enters a person from the outside can defile them? 19 For it doesn’t go into their heart but into their stomach, and then out of the body.” (In saying this, Jesus declared all foods clean.)
20 He went on: “What comes out of a person is what defiles them. 21 For it is from within, out of a person’s heart, that evil thoughts come—sexual immorality, theft, murder, 22 adultery, greed, malice, deceit, lewdness, envy, slander, arrogance and folly. 23 All these evils come from inside and defile a person.”
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Gentiles were never under the Law of Moses, only Jews were, so it is not a special dispensation that applies only to Christians. Jesus was and is the Fulfilment of the Law, and it is through Him that we Gentiles were and are welcomed into God’s family under the New Covenant.
Under the Old Covenant, inclusion in God’s family of Chosen people was through blood (being born a Jew and therefore obligated to follow Mosaic Law) and Law (convert formally accepting obligation to follow it). Jews who lived before Christ and Jews who are not Christians are still bound to follow all the laws, including the dietary laws. To keep these dietary laws is to keep the old God-given wall between Jew and Gentile. Jesus broke that wall.