Its not a fair comparison is it, even if you see there is a comparison. He using the afro american discrimination because it is incendiary and sensitive. Thio is a homophobe but not a racist.
He should have argued that gays deserve the same treatment as any other human being. How does a homophobe automatically becomes discriminatory towards afros americans. I can't see any logic in the link.
Using his approach to logic, he will even go on to claim that she is an Asian therefore all Asians are homophobes and therefore racist as well. Its quite ludicrous don't you think. After all, they all fall under human interest.