Idle Question

Given that some of the nations who have offered troops for the farce that is a ceasefire in Lebanon don’t recognize Israel’s right to exist (e.g., Malaysia and Indonesia), and the UN itself doesn’t seem to have a problem with this, what would they say at Turtle Bay if Iran offered up “peacekeeping troops” in south Lebanon? Since they don’t formally recognize Iran’s role in the war, how would they refuse? For that matter, why wouldn’t they accept an offer from Syria to help “police” its border with Lebanon?