It is of utmost importance to get ISIS out of the area and far from the Israeli border. The entire Middle East, even Hezbollah, understands this.
But as the saying goes, be careful what you wish for.
There are far more Hezbollah fighters than there are ISIS fighters, and they have years of battle training. After evicting ISIS, they will have hundreds of thousands of rockets and missiles, and they will acquire more. When they move into the villages, they will deploy their rockets and point them toward Israel.
Which would Israel prefer on its borders, ISIS or Hezbollah?