English is obviously NOT this guy's first language. Plus, Israelis are notoriously "rude" by American standards. When I was there, I often found their curt replies refreshing.
It sounds like you're going hyper-freak about nothing tangible. Who cares if you blew your chance with this school? It sounds like it's a long-shot anyway. You can't do anything about some possible mistake you've already made. Just keep communicating, add to your application if you can, and hope for the best. Quit worrying. It isn't helping.