In terms of the thread title, Homosexuality cannot be genetic since a "gay gene" is self-destructive, if we were to evolve to have that gene our species would die out. So either:
a) Miracle
b) Common genetic mutation during pregnancy
c) After birth
A Thesaurus is not a dictionary (For definitions), it means you get similar words. Phobia specifically references irrational fear whilst these all reference an aversion/dislike/distaste towards something.
@Undertaker
Homophobia is an irrational fear of homosexuals or homosexuality
You have not provided a rational basis for disliking/fearing homosexuals
You are homophobic

