Israel has a common cause with Chechniya, as Chechins are flooding into northern Syria to fight the Syrian govt. A number of Chechin Muslims have even been given visas to live and work in Israel.
The Chechin alliance is one of those policies which is short-sighted and opportunist. The Israeli govt seems to think that only the neighbouring states will bear the consequences. Unlikely.
Assaad is probably less of a danger than the Muslim Brotherhood who are running the insurgency in Syria.
Whoever made that decision there should probably be fired and replaced by a sane person!
Chechens do not need any visas to travel in Israel.