Most white libs cannot conceive of the LGBT experience as anything other than a binary of "gay rights: yes/no". They look at a map of "countries that recognize gay marriage" and sort the world into good and bad based on the colors on that map.
They don't want to think about how LGBT people may be able to marry in those "good" countries but might also get beaten or harassed or spat on or killed walking down the street with their partner. They also can't imagine that there are places where gay marriage is not legally recognized but people will leave LGBT people the fuck alone because there's a centuries long precedent of gay or lesbian or trans people in the local culture.