Homosexuality

I'm not too knowledgeable on why Christians(whoever else too) don't like homosexual love but a couple questions came to my head recently.

What kind of love do Christians have with Jesus? Is it like a parental love or something like a love for competition/sports? I assume it's not sexual love because he's dead.

Expanding on that, what's the difference between homosexuals getting married for love and the love for Jesus? Marriage is more than just sexual love so what's the big problem with it when grown heterosexual men love Jesus also?

And unrelated, if Jesus died for our sins, what happens when Christians say he's resurrected? Do the sins all come back or what?

I was brought up neutrally (parents didn't force me into anything though my mom is Christian and dad is agnostic) so I'm not too well-versed in the Bible and Christian thought processes.

Thanks :)