The problem is that they have dogma for very specific methods of revolution that require the tossing out of rational thought to maintain. They do not adhere to testing something to see if it works and then continuing to do it if it does or ceasing it if it does not work in the existing conditions.

They also adhere to pretty much all the things Mao was saying and doing during the cultural revolution when Mao himself had deviated from MZT and was making the most significantly criticised mistakes of his time. They are fans of Mao at his worst rather than his best, and I use the word fans with some purpose as I feel there is cult of personality surrounding him for specific time periods and actions while ignoring actual theory and method of practice.