How smart would it be to attack Iran?

was invading Iraq and Afganestan part of a bigger plan to surrounder Iran and invade them? we can't even handle what we already have on our plate and choking too! we will only strengthen Hezbollah if we attack Iran specially if UN doesn't support it. Hezbollah is not that popular Iran and it is just a matter of time for them to be overthrown by Iranian people. they just don't see a good alternative yet.