No. Any sex outside marriage is an evil passion and immoral.
But you claimed that the Bahai position on homosexuality contained elements that are unscientific and outdated, so how do you determine that all of it isn't as such?
Using the codewords "shameful aberration" or just "aberration", I couldn't find "shameful aberration".
"Bahá'u'lláh has spoken very strongly against this shameful sexual aberration" Homosexuality
I do believe it is a handicap because in the Baha'i Faith marriage is between the two sexes only, and the gay or homosexual person then would have to live a celibate life, which is difficult to do, if they are to be faithful to the teachings of the Baha'i Faith, unless they marry the opposite sex.
This is just question begging. It is only a "handicap" in the context of the Bahai intolerance of it. If Bahaism accepted it, it would not be a "handicap".
I someone owns a company and will not employ red-haired people, that doesn't make red hair "a handicap", it just makes the employer an intolerant idiot.
It is against nature in my view because the reason for sex is to produce children. That's how nature usually works.
Your ill-informed opinion is irrelevant. Homosexuality occurs an many species, so it is clearly not "against nature" but very much a part of nature.
Humans have evolved (or god designed us, if you prefer) in such a way that sex is very pleasurable and we have the urge to move sex even when the female is not ovulating. Therefore it is
not only about procreation.