Exactly, Russia’s “red lines” are now essentially meaningless as they’ve proclaimed them so often and then ignored when it’s happened. No need for Ukraine and the US to do the same. They have a clear goal (Russia out of Ukrainian territory) and have stuck to it. Everything else is just noise.As all good parents will know, red lines, are ... red lines.
My kids learned that when I said something I meant it, but you must be careful to make sure you can, and do, carry out the consequence (threat) of crossing the red line.
In simple terms: mean what you say and say what you mean.