"I'm homophobic. Please do not attack me."
Being homophobic involves prejudice or extreme dislike to gay people usually in an unfair sense, so I don't really see how you can avoid "being attacked".
"I would like gay marriage not to be legalized."
Why? Because of religion? Not everyone follows your religion. Because it, usually, does not involve children? You don't have to have children in a marriage. Because you, personally, don't like it? That's subjective. How is that fair to others?
"and I want gay cure to be available, because this is a disease, and diseases need to be cured."
It's not a disease and has not been classified as one since 1973 due to not posing any psychological impediments.
"Obviously, I'm not saying to kill gays, but I'm telling you to force them to be straight, because that's right thing to do."
No it's not at all. Conversion therapy, which is the act of forcing gays to "turn" straight, is psychologically damaging and is discouraged by reputable sources.