That’s a very persistent myth, but no, Hitler did a powergrab specifically using violence as an instrument. He got all the power because his supporters ditched the institutions they had and used terrorist threats as a justification.
America still has some institutions left, even though current dictator wishes to dismantle them all. Don’t let him, he wants you to ditch last bits of the political institutions and start a civil war, because he controls all the instruments that will let him win it. Your only chance of winning is to use the only thing fascists are afraid of - proper government.