"Hi, credentialing panel? I earned my MD degree at Walmart in only 1 year Here's my paperwork! When can I start work?"
Maybe the passing grade on the accreditation exam needs to be raised. How is it that it took this long for someone to realize that there are MD diploma mills? And as #2 states, only Arabs do this? Really? No Jews pull this stunt to get a license? The entire roster of physicians and dentists needs to be examined. Anyone 'graduating' from these schools in less than 4 years must retake a new certification exam.
As for the doctors and dentists from these schools who did pass their Israeli certification exams and have no patient complaints against them, I'd let them continue to practice. They'll know that they're being closely watched.