Hezb. are shia. Iran wants shia control. I would bet my last dollar that Ahmadinejad told Assad to give up sunni-affilated terrorists. It makes it sound like Damascus is doing a good deed. In fact, it would give more control to Hezb. and to Iran.
This is still a good thing.
1) It gets rid of a bunch of Muslim terrorists.
2) It gets all the Sunni countries pissed off at Iran, further splitting the "Muslim block". Who knows, mabye the Sunnis will start funding suicide bombers to infiltrate Iran.
3) Pass the popcorn!
Cheers!