Open, unabashed bias does get annoying. Even if I agree with it, I don't really enjoy seeing a comic strip used as a soapbox, religious or political (or both, in some cases.)
In this particular case, the bias is remarkably weak. After all, this is the way these soldiers fight, their mode of operation, the only way they can fight, disgusting and unjustifiable though it is. Nor is he insisting they're 'jealous' of us or some such rubbish.
I largely ignore such. It's not like you're going to argue with the author over what appears in a strip...wellll, you might, but you won't get very far.
Which is, of course, part of the problem...Any biased argument appearing in a comic strip or similar medium will, inevitably, go unchallenged.
That, or they will be challenged by Gil or the near equivalent. You might as well consider the argument unchallenged in that situation.
(Those just above this would be my primary difficulty with using a comic strip in this capacity.)
Now...
Since when do you have to make up radical conservatives or Christian extremists? ;D (Note of course that the earlier part of my post indicates that I am well aware of Islamic extremists.)
If he was insisting that all muslims are extremists, then I'd be really annoyed. I've seen some of that idiocy around where I live.
The anti-war folks will jump on any number as "too much"...
Primarily because some people really do believe any number is too much. Personally, I think they're doing an excellent job of thrashing around in the middle east so as to attract terrorists...the more go and battle them there, the less of them are available for plots against civilians elsewhere. Their purpose is to protect the civilians, after all.