isis fighters
Syria's chief negotiator at the Geneva peace talks Bashar Ja'afri accused Israel of "cooperating" with the Islamic State and Al Nusra, an affiliate of al-Qaeda in the Golan Heights

According to Ja'afari (quoted by RT):
"This Israeli provocation confirms without any doubt the cooperation between Israel and terrorists of Daesh (Isis) and Nusra Front on the demarcation line between where the Golan is and UN troops are positioned.

"It is no coincidence at all that this Israeli escalation was accompanied by irresponsible statements by members of the so-called Saudi delegation at talks here in Geneva," Ja'afari added, referring to the main opposition group.
The statement of Syria's envoy to the peace talks confirms something which is known and documented. Israel alongside Saudi Arabia and Turkey is a State Sponsor of Terrorism.

Israel does not deny that they have been supporting Al Qaeda out of the Golan Heights from the very outset of the war on Syria (March 2011). The occupied Golan Heights is being used as a military and logistics hub in support of Al Qaeda. Military aid and supplies are channeled into Syria through the occupied Golan Heights.

Prime minister Netanyahu confirmed in a semi-official statement that Israel is supporting Al Nusrah fighters out of the Golan Heights. The IDF top military brass acknowledged that "global jihad elements inside Syria" including foreign mercenaries are supported by Israel.

In 2014, Prime Minister Binyamin Netanyahu's visited the IDF field hospital in the occupied Golan heights, which is being used to treat wounded Al Nusrah mercenaries. The Jerusalem Post acknowledged that the hospital is being used to support the jihadist insurgency. (JP, February 19, 2014)

While the IDF field hospital was established to support Al Qaeda in an operation coordinated by IDF Special Forces, Netanyahu casually accused Iran for "its support of terrorist groups around the world". (JP, February 19, 2014)
Netanyahu toured the Golan Heights with Defense Minister Moshe Ya'alon and IDF Chief of Staff Lt.-Gen. Benny Gantz.

At a lookout point overlooking the Syrian border, OC Northern Command Maj.-Gen. Yair Golan briefed Netanyahu on the presence of global jihad elements inside Syria, as well as on the work being done to fortify the Israeli-Syrian border fence. (Ibid)
In the image below:

"Israeli Prime Minister Benjamin Netanyahu and Defence Minister Moshe Ya'alon next to a wounded mercenary [terrorist], Israeli military field hospital at the occupied Golan Heights' border with Syria, 18 February 2014โ€ณ (emphasis added)
netanyahu
Moreover, it is worth recalling that in 2011 at the outset of the war in Syria, NATO (with the support of Israel) became actively involved in the recruitment of Islamic fighters. Ironically, this was confirmed by the Israeli media. Reminiscent of the enlistment of the Mujahideen to wage the CIA's jihad (holy war) in the heyday of the Soviet-Afghan war, NATO headquarters in Brussels in liaison with the Turkish High command, according to Israeli intelligence sources, was involved in the enlisting of thousands of terrorists:
"Also discussed in Brussels and Ankara, our sources report, is a campaign to enlist thousands of Muslim volunteers in Middle East countries and the Muslim world to fight alongside the Syrian rebels. The Turkish army would house these volunteers, train them and secure their passage into Syria. (Debkafile, August 31, 2011 emphasis added).