Perhaps, but it's not something that is obviously unacceptable. I would put it on the same level as making a joke about an intruder coming to bomb/shoot everyone. Certainly it's in poor taste, but that's the level of humour you find everywhere.
if that was a real and possible threat to someone, then that would be totally unacceptable as well. Pretty sure people who went through 9/11 would not appreciate that.
Thing is, it's not found everywhere, there are very respectful workplace environments. If people do cross the line it is called out and dealt with and quite quickly things converge on what is acceptable and what's not.
It’s a shitty joke. Just move on. It shouldn’t be the company’s business to legislate whether jokes are in good taste. If just one person is uncomfortable on that team, they should just be put on another team, no questions asked. An entire team shouldn’t have to adjust their speech for just one uncomfortable person, especially when just one slip-up prompts that incident being shared company-wide in a massive and petty shaming attempt.