The apostle Paul was engaging in an objectively evil activity, however, since he though he was serving God, he was not actually culpable for it. And
Who was before a blasphemer, and a persecutor, and injurious: but I obtained mercy, because I did it ignorantly in unbelief. (1 Timothy 1:13)
Likewise,
For before the child shall know to refuse the evil, and choose the good, the land that thou abhorrest shall be forsaken of both her kings. (Isaiah 7:16)
But to sin knowing it is sin means one is is guilty of "actual sin." And to do so with full consent of the will is called "mortan sin" in Catholic theology. One who chooses to eat meat against his conscience is even guilty of "actual sin."
And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin. (Romans 14:23)
These classes are actually Scriptural, for while to break one law is to break all in the sense of making you a law breaker in needs of salvation, God does judge according to the degree of light and ability. Thus there are different degrees of crime in Scripture (unintentional, passion, and premeditated) and judgment relative to accountability.
The problem with Rome is that it too often calls good, evil, and evil, good, as in your case of witnessing about the real Jesus, and encouraging souls to leave the Catholic Church is called evil, while being an RC versus evangelical faith is called good.
Hmmm. I objectively judged, and determined I knew exactly what I was doing, by presenting those Catholics with the Gospel. 👍 I know many in the RCC might think I was endangering their salvation, which would be difficult, since it was my opinion, (just my opinion) that they didnt have it to begin with. The incredulous stares I got, were a sight to behold, like maybe that was the first time in their lives, that they actually heard the truth. 😇😁