Given that this happened as it did - had it happened elsewhere any of us, or any of our loved ones, could have been walking past such a gathering and been laying dead or wounded in a parking lot - perhaps, for just one thread, we could simply be thankful that one more of the victims - against, it seems, all odds - many have a chance for a life as a functioning human being?
And I'm sad that Judge Roll and the others were killed
I'd guess that there is more than one thread in which Freepers express their thankfulness.