The caption says "baby killers."
It is referring to a fatal house fire in Gaza earlier this month that killed three children. Hamas blamed Fatah (and Israel) for the electricity shortages that cause people to have to use candles; Fatah blamed Hamas for making it impossible for Fatah to fix the problem (as if they could.) Both have been accusing the other of raising taxes on fuel that is part of the reason for the fuel shortages.
In a couple of weeks they'll go back to pretending that everything is OK again.
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