Ok first of all…the Colorado shooter wasn’t non-binary. That was a legal defense to try and skirt hate crime charges. Dude was vehemently anti-LGBT on social media.
BUT EVEN INCLUDING HIM, you found 4 examples. Out of the ocean of mass shooters. An overwhelming majority of which are:
White (Over 50%)
Male (Over 85%)
This talking point that trans people doing mass shootings is a clear obfuscation from the real conversation about access to firearms and a lack of mental health services.
Fuck em