Ehh it wouldn't do much. A b25 bomber actually hit the empire state building in 1945 and the building is still there. It's a much more robust structure than the wtc.
My favorite cringe story about lighting things up in the colors of a nation's flag is when Sweden at the start of the Ukraine war made the baffling decision to show solidarity with Ukraine by lighting up city hall and the Stockholm subway in the colors of the Ukrainian flag. The problem with this is that the Ukrainian flag has the exact same colors as the Swedish flag, and since the lamps had already been installed for years they just turned them on on their default setting, just like they had done about once a week whenever there was any kind of national event, no matter how small. But this time it was for Ukraine, not a friendly football game against Slovakia or the queen's birthday or a Eurovision song contest or any of the other reasons they had turned on those exact same lights hundreds of times before. And THAT is how you do a TRULY empty gesture folks.
I'm mad at Ukraine for slightly ruining blue and yellow for me, my favorite color combination my whole life. At least I procrastinated long enough on getting the neat blue and yellow camo pants I wanted thats it's no longer an issue
The Israeli embassy account posted a bunch of these pictures on Chinese social media and the caption "we hope China stands with us" and it resulted in massive backlash with comments like "Eight Nations Invasion countries", "does someone have a QR code for donating to Hamas" and "Berlin, Rome, Austria, looks a bit familiar". I guess there's solace in knowing stuff like this is driving people in global south countries towards supporting Palestine more.
I did my performative show of solidarity today at my deli job - I purposely used green, black, and red markers on our sandwich special board. I wonder if my Evangelical chud boss picked up on it.