So which of these six assertions do you suggest is obviously unreasonable.

That's a question for Mercy, but it can be that (s)he finds unreasonable all except the fifth. No.5 is the only obviously reasonable one.

Note that 6 is not a position taken by Mencius, but rather an uncharitable inference, you are arguing that if what Mencius says is true, then the Palestine lobby is much stronger than the Israeli lobby, which obviously it is not.

I have paraphrased that for brevity. Still can't think about meaning of "A is a piece of dental floss compared to the arm-thick steel cable that is B" significantly different from "A is much weaker than B".