Where in the world are you getting such an idea? You have a distorted view about Israel's reputation in USA. Hopefully when you come to the US you will get straightened out.
On the matter of dating and having an American g/f, you're being premature and distorted there, too. If you don't even have an American g/f yet, how do you know there'll be such an issue in the future? Who says that you would want to marry an American girl anyhow? Why not just learn about other cultures a bit more? You need some more worldly exposure.
Get settled in US first...and learn more about this and other cultures. You'll find that you've been misled somewhere along the way. There are some very diverse bunch of cultures here.