Dont worry so much , if you walk and talk with peace you will spread it with your presence and breath.
Dont be scared to speak your mind, anything you can contribute will be accepted and thought on. I think your in for a surprise when you will see how accepting the people here can be, from both sides of the fence, and how understanding they can truly be.

But nobody likes a politician, so I would reccomend to concentrate on love and listening to people, listening.
As an Israeli, one of the things that are a rarity are listeners.
Too many mouths and not enough ears.

Im pretty sure that you know not to go into the worst area's , but your in for another surprise to see that its not as dangerous as people think.
Not even as tense as you would think.

Good luck kid. Have fun.