Even as the Islamic State terror group (ISIS) has experienced recent defeats facing the international coalition led by the United States, it still remains a threat to Israel. Writing at Israel Hayom, Professor Eyal Zisser says that ISIS has stepped up its activities in Sinai and the Golan Heights:
The bottom line is that, despite the relentless war Egypt has been waging against the jihadi group, Islamic State's hold on Sinai remains firm, as is its use of the desert peninsula as a base of operations from which devastating terrorist attacks are launched against Egyptian security forces.
Islamic State is gaining ground in the southern part of the Syrian Golan Heights as well. The Syrian regime has long since abandoned this area, as Assad has more urgent priorities if he is to survive the uprising. The Russian and Iranian involvement in Syria is also currently focused on the country's northern and central areas, leaving the Syrian Golan Heights to the rebels and Islamic State's proxies, such as the Yarmouk Martyrs Brigade, which has been tightening its grip on the area at the expense of the more moderate rebel groups...
This means that Islamic State presence near two major Israeli borders is increasing, despite the distress the group is experiencing in other major areas.
Many experts have attributed the recent Islamic State terrorist attacks in Istanbul and Brussels as a show of force by a group trying to exact revenge over its defeats elsewhere. I doubt that was the real reason for the murderous attacks but regardless, these attacks raise concerns that Israel will find itself in Islamic State's crosshairs, be it from Sinai or the Syrian Golan Heights, sooner rather than later.