Why are you still arguing this?
If you break down the root words, it still doesn't mean "irrational fear of homosexuals". It would mean something else, but you're only looking at the root word of "phobia" while ignoring the root word "homo".
And no, "phobia" is not exclusive to fear. The definition includes "aversion to". You can have an extreme or irrational aversion to something, but not afraid of it, and still be phobic to it. All you're doing is drawing a pointless line in the sand at the wrong place in order to drag out a meaningless argument you have no footing in.