You are simultaneously contradicting your own theology and biblical theology a thousand different ways. You say no Christian promotes sin or finds it attractive, and that Christians should strive to stop sinning. That is certainly true. However, you start introducing righteous-sounding lies in the moment you say everybody will stand in front of Christ as a sinner, which definitely isn't true. Paul taught in 1 Cor. 3:15 that God's saints will be judged like everybody else, but they will still be considered saints:
"If anyone's work is burned, he will suffer loss; but he himself will be saved, yet so as through fire."
You then proceeded to mix more righteous-sounding lies in by saying Christianity isn't about someone's performance, which clearly contradicts what James taught:
"But do you want to know, O foolish man, that faith without works is dead?" - Jas. 2:20
"You see then that a man is justified by works, and not by faith only." - Jas. 2:24
"Therefore, to him who knows to do good and does not do it, to him it is sin." - Jas. 4:17
A person's belief in God means absolutely nothing if that person is not doing what God requires of them, hence Christ's statement in Matt. 7 that the only people who will be saved are the ones who does His Father's will. So yes, biblical Christianity certainly does require a certain kind of performance from its adherents because the way they live proves whether or not their faith is the real deal.
When people say things like "Christianity isn't a religion, it's a relationship with Christ", it's a clear attempt at removing the responsibility an individual has towards God out of the picture. Christianity is about establishing a relationship with God through religion. It does not exclude religion because Christianity is supposed to permeate every part of a person's lifestyle. There is a reason why John said the people who know God keep His commandments(1 Jhn 2:3). I suggest you start learning what dead works are and and what the real gospel is, because it's extremely obvious by your theology that you don't know enough about either subject to be telling other people that they have it wrong.
