Come, now! Yes, Jesus came to die for all our sins... but if you believe that repentance and conversion aren’t necessary for us to APPROPRIATE that redemption, then you’re sorely mistaken. Heavens, you practically can’t read a single paragraph of the Gospels without tripping over that idea; do you really need references for that?
Absolutely, repentance is necessary. My point is that too many want to believe that one sin is worse than others.