Not sure how it was biased as there was no commentary. Everyone on tape said what they said. All the song and dance routines happened. The scary part is how many groups like that there are in the US.
Did Catholics believe in evolution before Darwin? If the pope has a direct line to a god why did he not preach about this before Darwin made his discovery?
To fit you analogy reformed alcoholics make some of the best alcohol rehab staff.
If they were advanced enough to make the trip their science would be well past ours. Their interest in past "great leaders" would be minimal because they would have no reference points to understand the wars and the culture, Artists would be of no interest for the same reason. Religious leaders...