Chairman Yang said:The real argument you should be trying to make, in my opinion, is that although Islam (again, defined as what Muslims THINK is Islam) has negative effects, it's benefits outweigh its disadvantages.
Your definition is not a good one. All human beings are flawed. Thus, all human beings have thoughts that are flawed. So by definition, some of what any person thinks will have negative effects.
Islam is one thing, Muslims are another. You can't automatically criticise Islam by looking at the actions of a Muslim. If some guy crashes his car, does that mean the car is crap? Maybe it is, maybe the brakes were out. Or maybe the guy was under the influence and it was his fault and had nothing to do with the car.
So if some Muslims throw a riot and you disagree with that, you aren't critiqueing Islam, you are critiqueing these Individuals. To put the blame on Islam, you need to show and justify your interpretation of Islam on the matter, and show how it caused the wrongful actions. So if you take these terrorists that blew up the trains in Madrid or London, you'd probably say that because puposefully killing innocent people is wrong, what these terrorists did was wrong.
But then to relate Islam to this matter you need to decide what you think Islam says on it. You might be of the opinion that Islam sanctions these actions and thus in your opinion Islam is a bad thing. Alternatively you might know that Islam specifically forbids the killing of innocent civilians even within war. Logically, you'd then form the opinion that the problem was that these guys didn't follow Islam. So the problem wasn't the existence of Islam, but the absence of it.
You're trying to have your cake and eat it in this case. You are hiding behind what extremists do. If you want to critique Islam itself, you should do so by standing by your own opinions of it. If you(the royal you) don't have enough knowledge of Islam, then you shouldn't step into the world of ignorant preaching and keep your uninformed theories to yourself. If you do know what you are talking about, then at least you can have an informed debate.
Trying to infer that the existance of Islam causes more problems than otherwise is also a flawed methodology. If history was changed and Adolph Hitler was a proper practising Muslim, the holocaust wouldn't have happened. On the other hand, if Islam didn't exist, among the billions of Muslims that have lived, maybe without the guidance of Islam among them would be people to rival Hitler on the evil scale. Either of those would dwarf any problems that any group of Muslims today cause. To blindly claim that Islam causes more problems than otherwise is a worthless claim.
Maintaining the uniformed approach that you currently are is just utterly pointless. In fact I would say that haphazardly guessing what you don't like about the way of life of over a billion people is in and of itself a bad thing. To argue with any merit that Islam is a negative you will need to use real logic, and proper reasoning and show the direct link between Islam itself and the negatives.