I don’t think that the Jedi deserved the Purge. But I believe that they needed to be reformed, because I am of the opinion that some of their dogmas were wrong. As I said in another post, I think that the Jedi were good people with good intentions, and I believe that Anakin had serious psychological problems that needed to be fixed. However, I also believe that he can’t be 100% blamed for what happened, and I think that the Jedi made some mistakes with him. Therefore, I think that the downfall of the Jedi was kind of everyone’s fault. It was equally fault of Anakin, Palpatine, and the Jedi themselves. The same goes for Anakin’s fall to the Dark Side. In my opinion, it is way too simplistic to believe that the Jedi did nothing wrong and it was all Anakin and Palpatine’s fault, just as it is way too simplistic to believe that Anakin did nothing wrong and it was all fault of the Jedi Order.
As you may know, I personally view the Jedi in a more positive light, but I respect your take and understand the reasoning.
In fact, one point I think we can both possibly agree on is that the Order was far too naive in believing a former Jedi like Dooku could never cause harm. Perhaps it goes to show how much they trusted Dooku. Perhaps it goes to show how rare it is for Jedi to fall. Either way, justifiably or not, it was a possibility they overlooked. It was a mistake they made.