The best proof that Islam is not “religion of peace and tolerance” is the strict application of Quran (Sharia law) in the most powerful Islamic countries like Saudi Arabia, UAE, Pakistan, Iran… (most of them are, by the way, the best friends and allies of the so called “democratic West”) In these countries, atheism or just a simple conversion to Christianity are punishable by death and (or) other cruel and unusual form of punishments…
http://www.vocativ.com/…/crime/saudi-arabia-execution-beh…/…

“Atheists living in 13 countries risk being condemned to death, just for their beliefs (or non-belief) according to a new, comprehensive report from the International Humanist and Ethical Union out on Tuesday. All 13 countries identified by the study are Muslim majority.
The countries that impose these penalties are Afghanistan, Iran, Malaysia, Maldives, Mauritania, Nigeria, Pakistan, Qatar, Saudi Arabia, Somalia, Sudan, United Arab Emirates and Yemen. With the exception of Pakistan, those countries all allow for capital punishment against apostasy, i.e., the renunciation of a particular religion. Pakistan, meanwhile, imposes the death penalty for blasphemy, which can obviously include disbelief in God…” (http://www.thewire.com/…/13-countries-where-atheism…/355961/ )