Extremism exists everywhere. Haredim are a small minority in israel who don't even believe in the state. Many of them don't even see a connection between themselves and other jews. Hassidim have been fighting with one another for months. These people will be stopped. This is israel, not Iran.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Peres urges Israelis to protest against religious extremism