The notion that an "international buffer zone" could solve the Israeli-Hezbollah problem could a a dangerous precendent for Israel...
After all, the same buffer zone idea could be used with the supposed "Palestinian State." This would undermine Israel's "need" to occupy Arab land on the West Bank and Gaza...and could result in calls for a Palestinian State...which of course Israel is Hell-Bent to avoid.
In short the Hezbollah problem and the Hamas problem could be solved in the same way...A BUFFER ZONE.
Likely Israel will draw a line between Hamas and Hezbollah however...and refuse a buffer zone on their "occupied territory."
These Double Standards are nothing new in the Israeli-US relations with the Arab/Muslim world.