> Because you don't jump off a bridge because Johnny jumped off a bridge.

Why not? Is 'below the bridge' a place we need to get to, and do we have a parachute?

> Because you don't jump off a bridge because Johnny jumped off a bridge.

Sorry, no, that analogy doesn't apply.

Here is a better one:

You invite Johnny to your home and he keeps hitting you and stealing from you (and you are banned from his house), you need to respond at some point.

> Because, ceteris paribus, unilateral free trade benefits an entity regardless of whether its counterparty taxes or restricts its trade.

Tell that to the Qing dynasty.