The reason we don't accuse Buddhism when a Buddhist commits violence is because very rarely do they explicitly say they're committing whatever they're doing in the name of their religion, nor in anyway to propagate their religion. That is to say, you don't have a doctrinal, linear, absolute, form of religiosity that demands conversion, demands superiority, demands singularity as is fundamental to Islam. Muhammad and his Quran is supreme, whereas in Buddhism you kill Buddha, and Sutras while important are not absolute.
The Quran is equal parts a political construct, religion, and a sociological text that covers everything from spirituality, to the idea of man, to how to wage proper war. Whereas a Buddhist text is not, but rather simply a constellation of philosophical conjectures, and assertions that mostly pertain to one's own consciousness.
The question is simple. Does ideology, and in extension religion, motivate people to be violent? I dare you to actually bring and propose to reinterpret the Quran. It simply won't happen, and until and unless Muslims in majority seek to reform/reinterpret the Quran, like it has been done in Christianity, you cannot progress Islam.
I mean if we're going to be entirely reductive then I think we can also say that ALL ideologies are also the same. The Allies, and Axis powers were in essence both the same thing, and either party weren't in any way morally superior. The Nazis were the same thing as Americans, and whoever won the war is simply a mere coincidence.
In a similar sense not all religions are the same.