Breaking news - Shooting at Synagogue in Pittsburgh

Charleston (Dylan Roof), 2015, is the most recent one I know how to find for the US. Maybe I’m just conflating the general “mass shooting in the US” with “religious troubles in the US”.

Actually, there is an eruv surrounding Squirrel Hill, and it is permitted to carry there on Shabbat.

Possibly. But however it is even that we have to think about it makes me sad no matter what.

Well, it wasn’t a mass shooting, just one killed, but there was the case of Dr. George Tiller, who was shot and killed at his church on Sunday morning, in 2009.
Dr. Tiller was the head of an abortion clinic that did late term abortions, and his killer stalked him to the church. I guess it’s alright to kill someone after they have been born, if you don’t like what they are doing.