The United States of America is the country most dangerous to Israel, USA, and Europe.
Why?
Because she is in what appears to be unstoppable decline, all the result of her thoroughly corrupt and compromised leadership; who in turn are all the result of an ignorant, uneducated, drug and sex addicted, and violent civilian population, who vote for and believe in the leaders who best represent them at the polls.
Result:
The Great Titanic is taking water...beginning to visibly list...as she goes under, all of the smaller ships and boats will be taken down with her; sucked down by the whirlpool created as she sinks.
Summary: No country or group of countries have ever been able to defeat the United States. Only the U.S. can do that to herself. Rabbi Meir Kahane said that eventually the U.S. would become Israel's mortal enemy. He was correct once again.