Where is the peace and tolerance among the followers of the religion of peace?
Look within first and you will find an answer. Followers of all religions have done similar things in the past and will do so in the future. Just because it is in vogue to critique Muslims and Islam does not make it right. Plenty has been dished out by Christians, Jews, Hindus etc. etc. at different times.
What the Mob has done is indeed wrong, but once again, after instigation which does not take into account the religious sensitivities of the Muslim masses. If you have a difference of opinion, you can debate, you can critique, but do so in a manner that is productive and not one where the sole purpose is to poke fun and stick your thumb in someone's face. It is an immature action, and I am afraid to say, the reaction is just as immature and brutal.