What "evasions"? I have repeatedly said that I don't support the policy. I don't support the policy. I think the argument advanced by the administration is wrong. I want you to tell me why you believe that, instead of just screaming "liar!" because you disagree. But you can't do that, to the extent that you'd rather attack me, even though I already agree with you.

Calling your opponent a liar convinces nobody. Making a constructive argument has a chance of doing so. But that's harder than insulting people.

> you’re simultaneously entitled to your bailey (disavowing any investment in defending the new policy) and your motte (“maybe they have honest reasons that aren’t anti-immigrant, ever think of that even though I won’t speculate on what those would be”)

You don't understand what Motte and Bailey means. I am not making an argument in favor of the policy, then backing away from that argument to a different position. I am making an argument against calling people names in lieu of actual debate.