Israel probably has chemical and biological weapons (as well as nuclear weapons) in their arsenal, so if crass hypocrisy were not part of the US armoury Israel would have been invaded years ago...
1. Probably? That's it? No proof?
2. If they do, have they used them? And the track record of the neighbors when possessing grown up toys?
3. Invade? As the Israelis would be the first to admit, they picked the one part of the Middle East with no oil.
C'mon, you can do better than this.