This is yet another aspect of racism a lot of white people simply don't understand. We can NEVER simply enjoy things or just have fun. Any of our special moments could be spoiled by a racist with beef.
ETA: Now that this horrible spotlight has been turned on transgender men and women they are now just as subject to this kind of behavior from their haters. This is the kind of attack dog behavior engaged in by anybody who simply wants to bully others, because one thing I have noticed, they never seem to felt this urge to run up on marginalized people who are in groups, or who look like they can take very good care of themselves. So the kind of people who do this kind of stuff know exactly what they’re doing because they know how to control themselves.