By any rational standard, an organism that is incapable of reproducing has failed natural selection and is a genetic error...
I would invite you to look into research on homosexuality in simian populations - the non-reproducing members contribute to the group in other ways, such as helping raise the young within the tribe, and resource gathering.
things like "SJW-ism" and liberalism - cancer cells attempting to attack the functional cells.
No argument with you there. Fuck everything about SJW-ism and liberalism.
I'm not even convinced that being gay or lesbian is genetic destiny. There have been studies with identical twins, and the correlation is far from the 100% expected if it were entirely genetic. This suggests that there are environment factors at work. Even if there were genes that increase the likelihood someone will turn out homosexual, this isn't necessarily an "error." The exact same genes could also enhance a person's ability to pass on the genes to the next generation, either through a survival advantage or making them more attractive to the opposite sex.