Ciao
I noticed that most of the replies try to connect these an acceptable so called terrorist explosions to Isalm and Muslims. This is a clear extreme racism against Islam. There are hundredrs of Christian, Jewish, Bhudist groups of different nationalities that do thing worse than what happened in London. Jewish terrorists killed peaceful worshipping people in AL-Haram Al-Ibrahimi, Basque are killing innocent people in Spain, Russian soldiers are killing and massacring whole villages in chechnya, Amercians are killling armleess people in Afghansistan, and Irak every day, they are bombarding villages and they are not terrorists. British soldiers are killing people in Irak, etc. and no one dare to say "Christian Terrorism or Jewish Terrorism". If he said such thing, he will be an extreme or he will be claimed to be antisemitic " By the way we are more semitic than Jews " Great world full of fairness and justice.
In my own point oif view and as a Muslim I do not accept what happened in London. That is because Islam does not allow killing innocent people even if they are noon muslims.
I think what happened in London is a natural consequence of what the stupid British policy is doing in the Islamic world. The British nad the Americans think that they can apply there principles and cultural codes to the Islamic world. They think that their own version of freedom is the best one for all the world. But they failed in all there efforts. Islamic culture is an old and strong culture from which the Euroopeans learned a lot. When British are acting against an enormous population of muslims in the world, when, they are helping Zionism in Arabian occupied Palestine, they should expect daily explosions.
What have been taken by force will be taken back by force.

My advice to the Western world is to take their barbarian soldiers back home to avoid more of these attacks. As we are seeing USA and UK with teir most advanced weapons and technologies are having a lot of troubles with Afghan and Iraki resistance. They should think about negotiaitons in stead of playing the role of Tyrant who will be soon defeated by the brave Afghan and Iraki resistants.