The anger of the Israeli public is understandable. However, by allowing the three MKs to return without being punished is to give an excellent example of democratic freedom and tolerance within the State of Israel. How many Arab countries would let any of their remaining Jewish citizens become members of parliament, let alone travel to Israel. I know some are calling the MKs visit treason. It probably is, but the reputational value of not punishing them surely outweighs any real harm done to the State of Israel.
26-year-old sustains serious injuries in Tel Aviv stabbing (Haaretz)
from the article: Bar-On wants passports of Arab MKs who visited Syria revoked