Yeah, that it wasn't an Orthodox place. Plenty of Reconstructionist and Reform places have many or most congregants that are not Halachically Jewish. Now while any hostage situation is not ok and especially if the target was a Jewish place, it's much closer to heart if the people were actually our brothers and sisters instead of standard fine people...
So you think four random people in a Reform temple (including a reform Rabbi) and you think odds are not even one are Halachically Jewish?
I hope you aren’t first-responder if I even need Hatzalah, unless you can check my Yichus as quickly as you can check my pulse
In any case this is a distraction and doesn’t belong here. An attack on a reform temple could very well have been an attack on an Orthodox shul, not the type of roulette anyone here who feels the need to make that distinction wants to be playing.