Best relief funds to donate to?

Title says it. Where should I donate that will be the most effective to giving relief on the ground? I have seem some individual fundraisers but I'm not sure how that might translate to material relief given the invasion starting. Is the Occupied Palestinian Territoriy Fund legit and a good org to give money to?

Side note since the OPTF seems to he officially connected to the UN is that not a tacit admission that Israel is Palestinian Territory?