Iran is a threat and their Hitleresque President has already vowed to destroy Israel. Further Iran is a producer of terror aiding Hezbollah in terrorist attacks against Israel and elsewhere as well as fuelling the terrorist attacks in Iraq. Finally a nuclear armed Iran is not just a threat to Israel but also Europe and our bases in the Middle east and Turkey. This is something that cannot happen and appeasement is not an option. Ask Neville Chamberlain how well that worked with Hitler.