If the Arab MK's go. They don't come back. Unless the visit is approved by the Israeli government the MK's that give comfort to enemy states do not deserve to be in the Knesset and should live in the "democratic" Arab states of their choosing.
Netanyahu orders more demolitions of terrorists' homes in attempt to crack down on terror (Haaretz)
from the article: Arab MKs: Bid to bar trips to enemy states is 'racist'