I'm not much into religions in general, even less so cults. And you can't claim that that lot were anything less than a cult. A picture is worth a thousand words:
A following or a cult ... it does not really matter what you call it.
Osho was all about de-programming. Not having a belief system.
Every time someone asked him a question, he would give an answer which always showed how misguided the question was, that, and an incredible amount of insight.
People who are "de-programmed" do not stand around in orange robes in the middle of the eastern Oregon desert, miles away from anything else (I've driven through the former site of their ranch, and it is extremely remote), waiting for The Leader to drive by in one of the 90 some odd Rolls Royces that they have given up all their money to purchase for him.
Part of the difference between a religion and a cult is that 'normal' religions are a part of people's lives, but coexist with the other things they have going on. Cults, like the Rashneesh group, are all-consuming. Those people lived out there in the middle of the desert, and "Rashneesh" was their entire life. They weren't just lining up at the Apple store for fun, or going to see the pope come to town or something.
Osho was not all seeing and knowing. The events that took place did so due to power hungry people that were attracted to him.
Would you blame Christ for the sins of the Church?
If you read any of Osho's material you'll find more insight on a single page, then you've received in your entire k12 education.
He might have made some mistakes but I doubt he was actively poisoning people and herding children like they were cattle.