That isn't making them look like an idiot, reducing them, or demolishing their position. That is completely failing to demolish their position! While also failing to convincingly explain your position.
> "If you have a good argument that the Early Bronze Age worked completely differently from the way mainstream historians believe, I just don’t want to hear about it. If you insist on telling me anyway, I will nod, say that your argument makes complete sense, and then totally refuse to change my mind or admit even the slightest possibility that you might be right. (This is the correct Bayesian action: if I know that a false argument sounds just as convincing as a true argument, argument convincingness provides no evidence either way. I should ignore it and stick with my prior.)"
Maybe the correct action is to see that how the Early Bronze Age worked has so little effect on your life, no testable hypothesis to confirm one way or the other, that it doesn't matter which one you believe, or if you believe both (even if they are contradictory, that's a thing humans can do). Instead of doubling down on one, let go of all of them.