ex.ex.expat,
I agree, they are taught to see perfection only in their religion and that undermines the ability to be objective.
The difference is that we can think freely with no fear of offending any divine or divine's representatives on earth or elsewhere; we see the good and the bad and we can criticize openly and equally any religion or religious leaders. They, on the other hand, are restricted and conditioned to only see the good of their side and the bad on the others'.