Prophets and Messengers were REAL PEOPLE...just like your mother is a real person. And because you don't subscribe to any religion....you will never understand what I just explained above. I understand that you don't know what is insulting and what is not to us. But if you want to criticize constructively, then you must do your homework before you bring forth your criticism. Study true Islamic sources and not sources from anti-Islam sources. Check out this funny 10 min video of a former Atheist from Australia:
http://www.youtube.com/watch?v=d-IuJL8HgvM

Penney...
I didn't expect you to understand about loving our Prophets above our mothers.
You said: "If I were criticised for 1400 years, I would either give up or change my stance."

Alhamdulillah, We Muslims don't give up so easily. Our Prophet (saw) said,"...if they put the sun in my right hand and the moon in my left hand to leave this matter(conveying the message of Islam), I'd not leave it till Allah supports it or I perish for it."

Adey:
Maybe you wouldn't rush to punch someone. But most people I know would fight over insulting one's mother. "Your mama...." are fighting words where I come from.

“Better to die on one's feet than to live on one's knees.” -Dolores Ibárruri