You both have valid points. How about this: all set-in-stone belief systems are bad. If someone's morals and world view aren't open to adjustment due to new information, trouble will ensue. We could probably in some sense rank the current belief systems based on their beneficiality and/or evilness, but that ought to be done based on their scripture, not on their merits. If not, we are not judging the system, we are judging populations affected by various other parameters, such as culture, resources, poverty, geopolitics etc. On the other hand, the members of those belief systems should be judged based on their own individual merit, not on their belief systems, for the exact same reason.

While I agree not all belief systems are equal, and they can probably be graded at least subjectively, I also think this is not very constructive since it's most likely offensive to pretty much all members of all belief systems, we are not judging the belief systems, we are judging the populations (more or less) adhering to them, and all of them are bad anyway. Except of course Scientism.