That was one of the biggest tragedies in recorded history. Do you even know what it did to the economy? It was like Black Monday on a 5x multiplier.
The World Trade Center, keyword TRADE. This isn't pokemon shit, this is real-world stocks and dollars. The portfolios were ruined.
The next time you laugh at that, think about the human beings that had their vacation bonuses decimated that day. Think about how the economic blow made countries like China catch up to us. Just think about that.
I'm uncomfortable with jokes about anything where innocent people dying is the punchline. I don't agree with the reasoning that because the US Government hasbt officially apologised to the Japanese people, then its justified to nake light of the deaths of people in the WTC.
In my view, it's not that 9/11 can't be joked about, but rather where the punchline lands. One that satirises Bush or the jingoism afterwards is different than one that implies the joker is happy about the deaths of random secretaries and janitors just because most of them were US citizens.