Originally Posted by zaron
First off Islam is not an ideaology but a religeon which in terms of a technical definition might be the same but in practical application is distinct because people choose an ideology but the vast majority of people though technically can choose a religeon are born into it. Essentially, it is for the vast majority of people (whether they choose to practice or not) an association by birth.
When you attack something such as this it is loosely the equivalent of attacking someone who is gay for being gay or attacking Jews for being Jewish which is also not an ethnicity but a religeon. Accordingly, if being anti-Jewish is the same as being anti-semitic (Arabs are also semites by the way) or being racist, than the same relationship holds true for Islam and muslims. You seem to be a smart fellow, so I doubt that you have failed to grasp this on your own. This is why being anti-Islam or anti-muslim is as wrong as being anti-Jewish.
This is also why all the remarks that you mention above are extremely offensive, if you don't like people throwing around "anti-semitic" slurs than you should probably try to refrain from doing the same to others.
Finally, if you think that human culture, customs and civility haven't evolved over the course of 1300 years and cannot understand what the contextual difference between something that happened in 640 and 1940 then you may be well served by installing a moat around your abode as there maybe some marauding vikings on the prowl.