Star Trek was at the cutting edge of social issues in the 1960s. They were getting away with stuff that no one else could, and they pushed it to the limit.
If the teachings of a religion and a clear majority of its adherents worldwide agree that homosexuality is something that should be “punished” and, indeed, in some countries, that punishment is death…
…do we need the modifier “radical” when referring to that religion by name? Or would that just be redundant?