I'm not really sure the social stigma compares to death.
Most societies have made at least some allowance for homosexuality. While it has never been truly accepted in any culture's version of "polite society," in most cases, homosexuality is not the certain death sentence you seem to view it as being.
I'm assuming because the fall back of the afterlife in Heaven was deemed worth it.
Perhaps, but I would still say that it was a rather irrational decision on the whole given the circumstances.
Wait. If it's their personal preference to embrace the 'homosexual lifestyle', then how is it really a choice? Do you 'choose' your taste in music?
Is a fundamentally irresistible genetic compulsion towards certain forms of music necessarily required for a given individual to prefer rock over country, or hip-hop over rhythm and blues?
Generally speaking, I would be inclined to say that it is not. One's preference is a function of individual choice more than anything else. People choose to associate themselves with certain genres because they, on some level, speak to that individual's environmentally determined sensibilities or outlook on life.
It is the same with many of the more bizarre fetishes out there, like extreme BDSM, bestiality, or fecalphelia. The idea that
all of these rather diverse forms of sexual expression could be driven by biological compulsion alone is rather far-fetched to say the least.
Likewise for the various "gray areas" which exist in many cultures around the world.
In many parts of the Middle East, for instance, it is common for supposedly "straight" men with wives and children to seek out young boys for sex and go back to their families afterwards as if nothing at all had happened. In other parts of the world, literal
shaved apes have been used for purposes of prostitution.
Would you say that these cases are more indicative of biological compulsion, or simple voluntary perversion? The former explanation would seem to be unlikely.
I'd say that personal choice very likely accounts for a far larger share of human behavior than you might realize.