Don’t want to follow religious beliefs

The more my father pushes his religious beliefs onto the world or onto me, the more I choose to not believe in a god or his beliefs. I do it to spite him, yet I can not force myself to change the religious status on my tags from Roman Catholic to Agnostic. I can’t change it because I know it would truly crush him. I love my dad I don’t want to hurt him nor do I want to follow his religious beliefs..