A religious individual does not have to be homophobic to shun a homosexual individual, be they family or not.
If God appeared before you today and said that homosexuality was immoral behavior, you wouldn't have to suddenly despise gay people. You could simply recognize that their behavior is ultimately wrong and immoral. That doesn't require hate or fear, that requires a moral judgement of behavior.
But since we've all become more than comfortable assuming each others 'true' motivations, the 'religion is homophobic/hateful' narrative has taken full force for a cop-out answer and guaranteed emotional reaction.