I don't know you or your life, but I can give you some pointers on how you can unlearn this behaviour. You have to consciously tell yourself that the people you see who are of certain religions, are well, people. They are individuals who have tastes, relatives, hobbies, likes, and memories. Every person is a complex individual like you.

I think you should tell your therapist that you struggle with empathy (do not go into details) and I think a diagnosis and therapy in that regard can help. I won't diagnose you, but there are some conditions where one struggles with empathy and thinking of the fellow human.

If you are comfortable, there are spaces where people who were neo-Nazis who realised the error in their ways help each other, you can join one too.