Support Israel? It depends. In the war against Hamas and Hezbullah- absolutely. In their continuing to settle the West Bank, no.
Peace in the Middle East? Depending on the cost.
Anit-Nuke Iran? No. Although I know it is for malicious intent, what right do we have to prohibit some one else from developing the weapons we possess?
A Jewish State? Why not, as long as they can co-exist with their neighbors.
Everyone has a right to live and exist the way that they want as long as they do not threaten or attack their neighbors. This, regardless of whether we are speaking of Jews or Muslims.