Continuing this argument is bordering on pointless. The majority of the outspoken individuals on this board would support the belief that the worst Muslim is still better than the best Kaffir.
Osama Bin Laden is a Muslim. It doesn't matter what he did. There will always be a justification for a Muslim who behaves in such a way.
This is the essence of tribalism. It is in no way exclusive to muslims. It plagues all ingroups, be they religious, nationalistic, racial, or whatever. It should be pointed out and guarded against wherever possible if we are to have anything resembling egalitarian society.
In this particular case, note that it acts on both "sides" here. You will have some muslims defending other muslims simply because they are muslims, even to the point of cheering on terrorist acts and making heroes out of terrorists, but you will also have westerners broadbrushing muslims as a whole and feeling superior, and making heroes out of their own butchers.
ou see this in the news reporting where they reported how many Americans or other westerners died fighting this or that, but you didn't hear about the many Iraqi or Arghan (etc) civilians. And only rarely did you hear about the abuses by the westerners on those people. There was even a serious debate over if torture of people who have not been tried or convicted of anything is ok. Of course it isn't! That such a debate was taken seirously shows a level of tribalism only normally seen at soccer games.
The situation in the middle east is a ready made Us vs Them and it is constantly used to great effect by those who have or seek power and influence. It provides the bogeymen they need to control us with, from "Al Qaeda" to the "Great Satan". They use history, religion, etc to demonize and divide the two "sides" against each other, to use them as pawns towards their own ends.
Only be actually meeting individuals, working with them, getting to know them, living near them, etc, can we hope to stop this. Boards like this can help (when people are not engaging in the tribal hatreds noted above).