Why do people use Religion as a tool to justify homophobia?

I was talking to a coworker recently and he said he hates gay people because in the Bible God created Adam and Eve not Adam and Steve. I asked what religion he belongs to and he said “no religion but it’s in the bible”

This seems like a twisted way of thinking, I believe it’s easy for people to cling onto something that validates their negative views on others.
Why do people use Religion as a tool to justify homophobia?
Why do people use Religion as a tool to justify homophobia?
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