I'd hope its to convince the government of Israel to get rid of corrupt leader Netanyahu, and to work towards an equitable two state peace agreement with an independent Palestine in the West Bank and Gaza.
Or failing that, to convince people that unconditional support of the current Israeli government is bad, actually. Something many Israeli themselves believe (not to mention non-Israeli Jews).
I feel like comparing murderers to other murderers wont swing any moderates to your side, but idk. If anything, making memes about genocide seems pretty dehumanizing.