If you look at the transmission statistics, you'll see that HIV does in fact discriminate, and quite heavily. The risk of infection for monogamous couples is effectively zero. Furthermore even if there are more HIV infections among heterosexuals than among homosexuals, one has to factor in that a full half of infections are among male homosexuals - less than a percent of the overall population, which gives them an infection rate of about 100 times that of a heterosexual. Doesn't that qualify as discrimination?
My point is that an all-powerful being looking to punish gay men could easily just kill them in one swift stroke rather than expose non-gays to the behavior. Or do you think a wife who gets infected with AIDs as a result of her husband's indiscretions or a kid who gets AIDs from a blood transfusion are legitimate targets of "god's wrath."
That's what I meant by "doesn't discriminate."