Iran? Syria?

The word seems to be seeping out everywhere through the woodwork that Iran and Syria are masterminding the Hizbollah and Hamas attacks on Israel, but there seems to be little factual basis for the claim. Here's Matt Yglesias' take:

It all looks to me like a story we've seen before. If you've been paying attention, a lot of people have been agitating for the United States to commence more active efforts to overthrow the Syrian and Iranian governments for some time now. Then some stuff happened and -- miraculously and without real evidence -- that stuff's occurence is suddenly the reason we need to implement the very same policy that was being pushed for previously. I'd like to see some proof.

In this case, I'm guessing the Israeli government (or its supporters) is pushing the story. The Bushies, of course, will happily climb on board.