I disagree with the use of the word "discriminatory".

I'm not trying to claim that the site is not a bit over the top, but using words like racist and discriminatory, even comparing the site to the KKK, instead of attempting to refute points made by the sites author or pointing out mistakes in fact are nothing but an attempt to discredit without directly engaging and are weak attempts to avoid a strong (over the top if you will) argument.

I haven't really "studied" the site, just browsed it.

My opinion is that they point out a lot of very "uncomfortable" facts about Islam and the Islamic message, and they do this in an abrasive and somewhat radical manner.

I see no difference in how they approach Islam and how some sites, Internet Infidels come to mind, treat the christian religion.