The iranian armed forces appear to be fighting the last Lebanon war in which they had some minimal success against mid level Israeli armor (Merkava III). Since then the Israeli armed forces have been modifying their armored vehicles with the Trophy active protection system which makes them for all intent a purposes invulnerable to anti-tank weapons. If the Iranian/Syrian/Hizbullah armed forces are foolish enough to provoke another armed conflict with aforwarned angry Israel, then the just might get their butts kicked and their armed forces obliterated.
Turkish president brands Russia's Syria strikes 'grave mistake' (Reuters)
from the article: Revolutionary Guards: Iran can penetrate Israel's Merkava tanks