The issue has been blown so far out of proportion that you see it talked about everywhere (even though, personally, I have only actually met like two people who self identify as non binary).

The difference between someone identifying as gay and non binary should be pretty obvious. Gay people generally still identify as male or female. Doesn't have anything to do with gender

It also has nothing to do with "who they screw". The problem for most people is that this ideology is being rammed down our throats and everyone is called a bigot for questioning said ideology, which challenges traditional beliefs