That's an easy one anon. The second article alone tells you why.
>Hezbollah, like Iran, is committed to the destruction of the Jewish state.
The supposed support for Sunni rebels is thought to have begun as early as 2013 under former Defense Minister Moshe Ya'alon, with the goal of creating a ‘buffer zone’ free of radical militants such as Isis and Iranian-allied forces along Israel’s border.
That it was actually ISIS fighters is just propaganda.