It is good to have an ally in the middle east, and the United States benefits from that. Israel benefits from our support and standing up for its rights. However, the US also loses when a strong stance of Israel hurts Arabs with whom we must also make some choices and by whom we can not afford to be seen as the enemy.
The US and Israel have a politically beneficial relationship. As long as the two countries are communicating well, the US can continue to act as a peace-maker in the Middle East. We have strong ties with Israel and a number of Jewish-Americans support and continue to support the relationship politically and economically.