It’s only an assumption if you don’t believe in evolution. If you do believe in evolution, then homophobia makes a lot of sense. A weak member of the tribe is a liability to everyone
Humans are K-selected; we have a small number of offspring and invest a lot of energy in them.
Thus, we tend to be selective in mate choices. From an evolutionary standpoint, same-sex relationships would be disadvantageous for reproduction.
That is even more reason to like gays they'll help you with your kids because they don't have kids to take care of. Like gay penguins adopt abandoned eggs
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Thus, we tend to be selective in mate choices. From an evolutionary standpoint, same-sex relationships would be disadvantageous for reproduction.
A priori reasoning is not baseless.
2. Your evo psych claim is speculative pseudo science until proven otherwise.
3. An ‘ought’ cannot be derive from an ‘is’ anyway: you can’t legitimate hatred with science.