Many places are rural and relied on having large families to take care of the elders and their work.

None of this precludes an acceptance of queer people. Most indigenous cultures, for instance, have more than binary gender roles. If anything, large multi-generational families decreases the social pressure for any one individual to have kids since you’re all raising them collectively.

Europeans don’t have a monopoly on being shitty people

Sure, but they certainly have a talent for it.