True curses are reserved for those who preach a perversion of Christ’s gospel

Galatians 1:7-9

But there isn’t another “good news.” Only there are some who trouble you and want to pervert the Good News of Christ. But even though we, or an angel from heaven, should preach to you any “good news” other than that which we preached to you, let him be cursed. As we have said before, so I now say again: if any man preaches to you any “good news” other than that which you received, let him be cursed.