What goes zoom and ends with a bang? An air strike on a children's hospital
That's not funny! Are you being serious right now?
It's a joke, it's funny. Of course it is not very funny if it happens in reality.
It is not right to joke about harm towards children. A lot of people might be offended by your joke? Can you imagine what goes through a parents mind if their child has to stay in a hospital?
Yes, because clearly the people who gets it would be much more hurt than those who don't.
You shouldn't try offending people this way. How about you think about apologizing because right now you are making light of people dying, and people will believe you're acting sick.