Yes, and what you're describing is an opinion by others, which thank heavens you can still see. It can definitely be unsettling to have generally accepted facts suddenly be questioned, and I'm sure you've done enough research and listening to come to your own conclusion about their accusations.

So - on one hand opinion (that you don't seem to like)

And on the other hand censorship - the primary concern of many in this thread - which is the control of info by the govt, usually at the behest of interest groups

I think you're equating the two.