Nobody is celebrating hurricanes or natural disasters or anything like that, even if they hit folks. The point of saying "guess god had it out for them" is to mock the hypocrisy and indefensible evil of them saying all their shit. Them is the depraved, subhuman scum rooting for AIDS in the 80s ("GAAAAAA--AAAWD sent this disease to punish them fer sinnin'!"). Etc, etc, etc. It's the depraved psychopaths spreading this propaganda who are called out. People are supposed to understand that when they get offended by something that's the exact same bullshit they've been saying, they should experience some cognitive dissonance.
Nobody is rooting for poor people to die. Except the leaders of that camp. Death is really profitable for them, it's a great opportunity to grift. Every fucking time