Being against marriage of homosexual people is not at all akin to mass murder.
Continuing to marginalize a vulnerable segment of society sends a message that it's ok to harass and kill members of that segment. It's not mass murder, but it certainly encourages violence.
Continuing to marginalize a vulnerable segment of society sends a message that it's ok to harass and kill members of that segment. It's not mass murder, but it certainly encourages violence.