Sure, arson is wrong, but it's satirizing the proposition that when condemning residential schools, we should think of all the good things that they did, which is BS. If the residential schools were run by Muslims, Hindus, Buddhists or whatever and they had similarly acted oblivious to the damage it's caused I don't think people would feel too sorry if a few of their mosques or temples burned down either. But they weren't involved, so that's a bit of irrelevant whataboutism to deflect from the long running institutional failing of the Catholic Church. They've found over a 1000 graves now but I'm sure there are
thousands more tiny broken skeletons buried in holes in the ground.
This is the same organization that has yet to apologize or pay the fairly paltry $25M in damages they agreed to to compensate victims. Sure, it wasn't these individual churches but the anger against the organization didn't come out of nowhere. They are the biggest land owner in the world, have assets worth billions, and a fairly lucrative bank.
https://www.cbc.ca/news/canada/saskatoon/critics-blast-catholic-church-1.6086030
Similarly, they are still protecting child molesters from prosecution. Must have missed the part of the bible were murder, violent sexual and physical abuse of children was totally cool once someone served their contrition and didn't need reported to legal authorities. The organization has yet to make any real public contrition or make real changes to bring any of these criminals to justice.
They've f*d around for a few millennia and are starting to find out. Probably lots of relevant bible quotes along the lines of 'reaping what you sow', and also 'protecting the children' that are worth pondering, and they lost any claim of being viable moral authorities long ago.
Plenty of practicing Catholics that do a lot of good in their communities, and really live the basic tenets of the Golden Rule, but doesn't change the fact that the institution is completely rotten. Plus, fun story, if you read the bible, Jesus was preaching against exactly the kind of golden temples with idols that is exactly what a lot of the big Cathedrals are, so it strayed from it's roots about 1700 years ago, which is around when Constantine decided it was easier to win the church over via bribery of the priesthood than fight the zealots.