These comparisons you are making are absolutely ridiculous. Are fat peopled prevented in most states from marrying each other? Was it ever a felony to be fat? Hell fat people are in the majority anymore. Moreover, someone that is obese can lose weight, someone that is gay cannot change their sexual preference.
People are defined by who they are and what they do. For example, I am married, white, straight, a father, an avid runner / cyclist, form the South originally and so on. Its quite easy to state I am these things because by and large society has been pretty easy on white straight guys. That is not all that defines me, but it is part of what does. Similarly, someone that is gay might be an avid runner, they may be from the South, in some cases they may be a father, they might be white, in a few states they might be married, but they are also gay and there is nothing wrong with that, it is just another aspect of their lives that defines them. Telling their friends and family that they are gay does not mean they are trying to be divisive, but rather that they are just revealing something about themselves. There is nothing liberal about that, and only a bigot would see anything wrong with that.
Finally, it does take some courage on their part to come out because unfortunately there are still a lot of religious and social conservatives that are not too keen on people being gay.
