Juan Cole notes in a blog entry today that:

[…]
Ayman al Zawahiri today made a change in both policies. He wants al Qaeda to pile on in Gaza and to defend Hizbullah in Lebanon.
[…]

From Al Jazeera:

While western analysts are describing Hezbollah as merely an extension of Iran, and therefore "Shia interests," the people of Cairo and Amman, predominantly "Sunni cities" took to the streets carrying pictures of Hasan Nasrallah the Shia Arab leader, defying the "Sunni-Shia rift," described by Peretz.

Most western observers have conveniently ignored widespread Sunni support for Hezbollah throughout the Arab and Muslim world.

Consider also that Nasrullah has extended support to Sunni Palestine. As Juan Cole notes:

As usual, Israel is radicalizing the Muslim world. The US, too, will suffer.