Another census in 1959 showed that demographics had changed significantly - the population was ~75% of Estonian descent. I assure you that ~165 000 people did not magically change their descent in that period of time - this change was the direct result of deportations, executions, forced drafts into dictator-led armies, etc.
Assuming that the migration of every single person to and from Estonia was forced and done in deliberate pursuit of russification is a pretty major flaw in this argument. Economic migration in the rest of the USSR was common. Why do you rule that out completely for Estonia?
Sure, but omitting nuance by default allows for painting a black-and-white picture of history, which helps fabricate a justification for nationalism. We hopefully all understand what that leads to and who benefits from it.
I will read it, although honestly I am not really confident about the reliability of the report so far, judging by the following (mutually unrelated) excerpts with the most interesting parts highlighted:
All in all, it reads more like fascist-leaning propaganda than a scientific report.