Note the capitol letters. This is a very badly-written statement that creates confusion. What the authors were trying to say is that they object to the moral relativism embodied in the HOTS program, which is a particular educational curriculum intended to teach critical thinking. They are not (one would hope) opposed to critical thinking or he teaching of it, but to the particular way that this program teaches it. That is a legitimate point and not nearly as crazy as they make it sound.
Outcome-Based Education was a disastrous educational philosophy that failed to accomplish any of the results it promised, and HOTS is just more of the same packaged under a new name.