Everyone on this earth who professes some kind of spiritual belief thinks that they are right.
Nobody, therefore, gets to use their own personal conviction to justify their position to others.
It doesn’t matter one tiny bit how right you think you are.
The value of your beliefs lies in the results they produce.
It doesn’t matter if you didn’t pick up the gun, didn’t pull the trigger, didn’t directly shed the blood of others.
If your beliefs, taken up by those with different moral boundaries, can lead to oppression, violence, even mass murder, your beliefs are worthless.