Trump's critics charge that his decision will destabilize the Middle East and stoke violence across the Arab world. Tensions between Israel and the Palestinian territories may well be inflamed by the move. The Palestinian envoy to Britain says the decision amounts to a "declaration of war," and Palestinian Authority president Mahmoud Abbas says it will have "dangerous consequences." (For its part, Hamas says that Trump has opened up the "gates of hell.") That is all par for the course for the Palestinians, who often resort to violence and threats of violence even when we aren't allegedly provoking them. We shouldn't let the irrationality of the Palestinians dictate our policy.