It's a type of argument called [link|http://en.wikipedia.org/wiki/Ad_hominem|ad hominem]. You're attacking Wafa's right to criticize rather than the opinion she puts forth.
I think most of us in the West believe that everyone should be able to express their opinions about anything and the strength of the argument determines the 'victor in the battle of ideas'. Peaceniks who have never been in the military can criticize the Pentagon and the war. Mothers can criticize the nuclear power industry. Everyone can criticize the schools. And atheists can criticize Islam, Catholicism, Buddhism, Judaism, etc. If only "experts" can criticize something, then society breaks down. Instead of a society based on consensus of the governed, you'd end up with a small dictatorial elite deciding orthodoxy. I don't ever want to see that. I also don't want to ever live in a society where people are killed or threatened with death for their criticism.
Your closing reminded me of a story I heard on the radio about inshallah. I can't find a link, but [link|http://strengthandhonor.typepad.com/captaink/2005/09/fighting_gods_w.html|this] covers the topic pretty well. "God willing" is a rare expression here. We have a tradition that "God helps those who help themselves". :-)
Salaam.
Cheers,
Scott.