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.
No, they have a valid point. If you had to pick a building that probably had a bunch of random evil stuff going on that would be it. They could have blown up Disneyland. That would have been a bigger propaganda hit. Instead they ment to strike at the heart of the worst people doing the worst things on earth. It was an okay pick.