Yes. Christians are taught that Jesus lived without sin, but are not told to live like him in every way. Male Muslims are told Mohammed is the example for all of them to follow. ("perfect" might be the wrong word because Mohammed did err a few times, for intance about the three goddesses and when he slept with one of his wives out of turn)
If Muslims are going to use Mohammed as the example of a perfect or near-perfect role model, I think it's perfectly fair to criticize his behavior.
Have you seen the info linke at 7?
I finally figured out what Islam is when I learned it's all about emulating the "perfect life" of Muhammad. Muhammad had good aspects to his life but was a Jihadist murderer later on. Koran reflects this. Koran is not only evil shit. Learn more here--->>>
From Rags to Riches, From Preacher to Despot
http://www.faithfreedom.org/Articles/sina/preacher_to_despot.htm