The US could come out and confirm that, through their investigation, that Israel was not responsible for the hospital attack and people will begin to call them liars as well.
Some people seem to want it to have been an Israeli attack rather than a tragic unintentional incident by another party. At the moment we have video footage that shows the warhead landing on the area where the hospital is, having being fired locally from the area. On the opposite side we have a tweet that blames Israel, and that's enough.
People don't want to find out the truth, they just want to fan the flames further.