It's really simple, and President Trump got it at least 90% right.

Warning: I didn't feel like helping it. My language has got a bit colorful here. If you are sensitive to mild cuss-words, please refrain from reading further.

I read this New York Times article a few days ago. You'll notice the left leaning hand wringing about this “sensitive issue.” You'll notice the doubts about whether this will help or hinder.

There is no doubt. This will help. If you want to get on with negotiations, you get the “sensitive” issues out of the way. If the other side will not negotiate in good faith, you settle the issues you can, and offer them again to come to the table. If they keep refusing, you keep settling issues. At some point in time, they get it might make sense to show up at the table.