There were some terrorist attacks on places such as abortion clinics in the United States, and there was the KKK.
While not necessarily massacres, there are several reports of attacks on LGBTQ people everyday, usually with the attackers saying along the lines of "this is Trump country, f****ts". While Muslims are definitely capable of doing the same thing, I strongly doubt they'd be praising Trump while doing so. Currently, the amount of murders against transgender people stands at 8 for this year. For last year (2016), the amount of murders stood at 27.
Have an upvote, though. I like having calm, collected debates. :)