And Arab counties won't take them either because they cause trouble. Egypt in particular absolutely refuses to take refugees from Gaza.

They don't take refugees, because they are already not well-off economy wise. Having millions of refugees would cause their economy to collapse, and they don't have the capacity to feed them all and shelter them. They also can't ensure that every refugee is not a militant that would try to attack Israel back, from their borders, causing the IDF to lob bombs onto Egyptian territories.

Why are your trying to blame all Palestinians, like as if they are a monolith and all of them are troublemakers?

The Economy is (population)*(productivity per citizen).

If Egypt was smart they would ask for them all, ask the world for major help, look like hero's, and grow the economy.

They could certainly demand the US and Europeans, US and Gulf State to kick down some coin to pay for it. The problem is Hamas is an offshoot of the Islamic brotherhood and so everyone especially in the middle east sees them as radioactive.