[lolc]

The general idea is that Iran would be more effective as a regional power if it wasn't ruled by islamists. And that at least the current government of Israel likes incompetent neighbours that make them look good.

Not a difficult argument in my view. Unless you're stuck believing what they say instead of observing what they do.

[randomNumber7]

It seems pretty reasonably that Israel would be happy with a neighbor that doesn't call for its annihilation out of ideologic reasons.