Just Be a Good Person
That is difficult to answer because someone’s knowledge or denomination of that religion makes it entirely subjective. My maternal grandparents were Missionary Baptists and genuinely good people. Did that make them true Christians? I don’t know. My grandfather was overweight and my grandmother ate shellfish. Both are no-no’s mentioned more than homosexuality in the Bible. Did that make them fake Christians? I still don’t know. They tried to be what they thought a good Christian is.
In my opinion, anyone that teaches their children a story about a God committing the most thorough act of genocide in their version of human history are more likely to knowingly or subconsciously accept atrocities committed against other humans as long as they believe that it is justified by their religion. Does that make all of its followers bad people. No. Just more likely to be compliant with bad leaders.