Society iwill not collapse if a small percentage of the population are in loving, happy, successful homosexual relationships. After all, it never has before.
It will collapse when homosexuality is considered by the host society as normal. Or at least it is an indicator of societal decay. After all, it always has before.
It is unlikely that normalization of homosexuality alone could cause a societal collapse. But it's never alone. It comes with a larger set of societal changes that contribute towards the general decay. But, like those other changes, the value of homosexuality is never passed on. Likely, the normalization of homosexuality can only occur after much of the culture has already been destroyed.
The best that gays can hope for is a brief period of having their abnormality ignored then a return to extreme violence with persecution and slaughter as the permissive society is conquered and replaced by a stronger and more robust people. That's the way it has always ended up.
Don't confuse normal with natural. It is natural for animals to eat their young, many do, but it is not normal behavior. Animal behaviorists will look for triggers that cause the abnormal behavior.
All human behavior exists on a continuum therefore all human behavior is both normal and natural even the undesirable behaviors such as violence and murder.
And when you use terms like always and never you sabotage your own argument.
All human behavior exists on a continuum and that is
It's what are we going to accept as a society. Is murder and violence permissible because it is part of the human continuum. Although I think you mean human condition. The intense desire to take the life of another is natural, but considered abnormal and we examine the brains of those who feel that way.
To my knowledge a rapist has never used animal behavior as justification for his behavior in raping women saying that rape is normal and natural. I have heard men use bear behavior to justify leaving the cubs and their mother. A male impregnating a female and leaving immediately thereafter is both normal and natural - for bears. Therefore it is normal and natural for men who should not be expected to stick around. Both behaviors are part of the human condition but not normal.
Schizophrenia is a natural aberration in the human brain, it is not normal. Neither is homosexuality. Homosexuality is, however, benign. It stays benign until it demands to accommodation of otherwise normal people to consider the abnormality just another form of normalcy. Sort of like the way it would work if we had to consider the behavior of schizophrenics perfectly normal behavior and accommodate it.