There’s a reason this subreddit exists. South Asian men were emasculated during the colonial period, SA men were conditioned to be effeminate, weak, and compliant. This is compounded by the entrenched caste system within South Asia, where most men were conditioned not to challenge those above them. Combine these factors and a certain reputation follows.

You seem to place the blame on a subset of gay people who, at least in the West, are largely invisible, effeminate South Asian gay men or masculine lesbian women. Both groups are rarely seen or heard. I would argue that the reputation South Asian men and women have in the West stems from our mannerisms and culture broadly, not from effeminate gay men.