The US and UK are upset with you, but do nothing other than continue to pressure you. Domestically your decision is very popular, and Germany's economy jumps. International business takes no major hits, suffering only from the minor contractions caused by the tension between Israel and Iran.
Overall, your decision is successful domestically. However, you have nothing to help diffuse international tension. While Iran and Israel ignore you, tension between the two states mounts. You have left the situation in the hands of the UN and a few involved countries. You can now only hope they are successful in resolving the conflict before it spreads to the world economy.