I don't know about you, but whenever someone tells me an ISIS joke. I laugh my head off.
What's so funny about ISIS?
I laugh because they deserved a medal after flying planes into buildings.
It is not funny to joke about terrorist flying into a building and killing people. It can encourage other people to be terrorists.
I won't take this further, as you seem like a close minded person.
I am not that close minded but a lot of people get hurt in terrorists attacks. And making statements that laud terrorist just encourages people not take those attacks seriously.