Were his sketches of what he foresaw frightening to those who saw them? Did they threaten or were they objects of derision? Was TESLA a mad scientist/genius.visionary?
A flying machine? A submarine? WHAT else did Da Vinci sketch that came to be reality?
How many visionaries are out there whom we write off as mad? I have no idea.
Do you write off things you don't comprehend understand as being impossible or ludicrous? Do your limitations form the world you accept/reject? If YOU don't comprehend it then it must be incomprehensible to everyone? As you go so goes the world? Your way or the highway? Either or? Ultimatum?
Political parties are formed on that specific foundation. How limiting and absurd is that?