[so_real]

Homosexual people tend to experience more mental health problems than heterosexual people

Or is it that mentally ill people are more prone to engage in homosexuality? This is a chicken-and-egg situation. Does homosexuality cause mental illness, or does mental illness precipitate homosexuality, or are they both symptoms of another disorder entirely? Regardless, the terms "normal" and "healthy" do not apply.

[Albion Wilde]

Or is it that mentally ill people are more prone to engage in homosexuality?

That question needs to be asked and answered with regard to risky or transgressive sexual behaviors, in that many people engage in high-risk behaviors of various types, including car racing, alcohol binges and extreme sports, in order to self-medicate depression with adrenaline. It only works for a brief time, and then the need for more. So, if one's orientation gets people upset, it increases the adrenaline rush to do it and to parade it.