Re #3, it's easy to fall into the trap of thinking your worldview is the only right one. There's a fairly well-known historical case, this guy named Lewis Strauss, a major early US Cold War figure who pushed the hydrogen bomb and famously claimed nuclear power would be 'too cheap to meter'.

He was widely known for his debating style, in which he'd first assume anyone who disagreed with him didn't understand his argument, and after further refusal to agree, would then assume that person was a traitor in the pay of the Soviet Union.