I´m sure there´s a whole lot of Israelis who would want a "Endlösung" of the Palestinian conflict, too.
There is nothing wrong with a final solution in itself. If my tooth is aching too much and I decide to have it pulled, that is a final solution to my toothache. Nothing immoral about that. The problems start when the proposed "solution" involves things like murder, rape, "medical examinations" done by Dr. Mengele, and so on.
A final solution to the problem of terrorism would be if Israel started acting like a nation at war normally does--like the U.S. and the U.K. did in World War II, for example. I, for one, would very much welcome such a solution.