Those bombs were a very small thing when set against the death and destruction caused by American foreign policy since the Second World War. Israel and Saudi Arabia are only two among many unpleasant regimes supported by the US in Asia, the Middle East, Africa and South America. The consequent torture and loss of life suffered by local civilians does not bear thinking about.
It is vital, therefore, that this country should remain a place where victims of brutal regimes can find sanctuary and express their views freely. They live in interesting times and what they have to say is interesting, if unpalatable.