it works at keeping out illegal immigrants and the few who get in from time to time are given a choice between prison and deportation. terrorist attacks inside israel are almost always done by people living inside the country since the wall went up because its too hard for anyone to get in.

https://en.wikipedia.org/wiki/List_of_Palestinian_suicide_attacks



like them or not, the israeli wall is effective just as sinking migrant boats of lesbos and destroying the libyan ports would be effective. the only difference being the israelis don't pretend to care about somalian and sudanese human trash and our leaders do.