You cannot assert that if you cannot demonstrate that homophobia is 0% genetic (I am using "genetic" loosely here). In reality, like most complex human traits, it's partially genetic and partially environmental, hence it is outside the control of at least a subset of those exhibiting it.
You're also skipping over the "systematically persecuted" part. I guess you could say the modern liberal distaste of homophobes is "systematic", but it's such a weird example to choose given the paradox of tolerance.
This is exactly the type of reaction I expect from modern leftists when they are proven factually wrong and logically inconsistent. Thanks for being an epitome.
>You're also skipping over the "systematically persecuted" part
Homophobia is a crime in the EU. So much for not being "systematically persecuted". Homophobes fit that description far better than homosexuals today.