"They merely shared the same ideology" EUROPOL report on terrorism - section on Islamic terrorists.
"There
is no moderate or immoderate Islam; Islam is Islam." response made by Erdoğan on concerns
over Turkey turning into a Malaysia. 
 According to Qutb (Muslim Brotherhood), "There are two parties in all the
world: the Party of Allah and the Party of Satan – the Party of Allah which
stands under the banner of Allah and bears his insignia, and the Party of
Satan, which includes every community, group, race, and individual that does
not stand under the banner of Allah."
  “This is a war and they should be thankful that it wasn’t more.” Irish Muslim on terrorist bombings in Boston.
 The earth is flat, and anyone who disputes this claim is an atheist who deserves to be punished. [Muslim religious edict, 1993 Sheik Abdel-Aziz Ibn Baaz Supreme religious authority, Saudi Arabia]
'The normal situation is to take money from the kuffar. You work, give us the money, Allahu Akhbar (God is great).  Anjem Choudary
 At the end of his long and cantankerous life the maulana
 had gone against all his high principles. He had gone to a Boston 
hospital to look for health; he had at the very end entrusted himself to
 the skill and science of the civilization he had tried to shield his 
followers from. He had sought, as someone said to me (not all Pakistanis
 are fundamentalists), to reap where he had not wanted his people to 
sow. Of the maulana it might be said that he had gone to his 
well-deserved place in heaven by way of Boston; and that he went at 
least part of the way by Boeing.
V.S. Naipaul
 I found religion equally oppressive in real life. And I realized that 
religious oppression and injustices are only increasing, especially in 
Muslim countries. The religious terrorists are everywhere. But if I 
criticized Muslim fundamentalists and mullahs in particular, it is 
because I saw them from close quarters. They took advantage of people's 
ignorance and oppressed them.  Bangladeshi writer Taslima Nasrin, in exile
 Fundamentalism is an ideology that diverts people from the path of 
natural development of consciousness and individuality, and undermines 
their personal rights. I find it impossible to accept fundamentalism as 
an alternative to secular ideas. 
My first reason is the insistence of the fundamentalists on divine justification for human laws.
   Second, the insistence of fundamentalists upon the superior authority of faith, as opposed to reason.
   Third, the insistence of fundamentalists that the individual does 
not count, that the individual is immaterial. Group loyalty over 
individual rights and personal achievements is a peculiar feature of 
fundamentalism. Fundamentalists believe in a particular way of life; 
they want to put everybody in their particular straightjacket and 
dictate what an individual should eat, what an individual should wear, 
how an individual should live everyday life -- everything would be 
determined by the fundamentalist authority.
   Finally, though they proclaim themselves a moral force, their 
language is hatred and violence. Is it possible for a rationalist and 
humanist to accept this sort of terrible repression? [Bangladeshi writer Taslima Nasrin, in exile]