God or evolution?

What if a person killed others, etc., but then, after some time, admitted their wrongdoing? Should they be forgiven? Impunity is a terrible thing.

Admitting wrongdoing is not enough. One must repent, pray for forgiveness every day, and also demonstrate it through actions.

And that's because their soul, due to sins, loses its connection with God and even more than that – loses its desire for God.

It reminded me of the situation with the Scarlet Monastery from World of Warcraft.
Let's say there are some terrorists, like Al-Qaeda, but Christian.
And they blow up people. For God. That is, they commit a sin, but they believe in God and don't lose their connection with him. According to your version, will they not go to hell?