You can wish for an open border at some vague point in the future when circumstances are somehow favorable to it. It doesn't actually reveal a lot about what your policy would be now.
For example, I dream of a world without nuclear weapons. That doesn't mean I believe in unilateral disarmament. And yet that is the logic ed applies to Clinton.
Identity politics are neither inherently Marxist nor even inherently left. An example--how many people on the right engage in politics around being Christian? Identity politics is any time someone appeals to a group affiliation to connect with voters. Partisanship itself is identity politics. I agree we could use less of it and look more at issues. I also think candidates should campaign on their own merits instead of their opponents' flaws, and that everyone should have ponies.
"If fighting is sure to result in victory, then you must fight! Sun Tzu said that, and I'd say he knows a little bit more about fighting than you do, pal, because he invented it, and then he perfected it so that no living man could best him in the ring of honor. Then, he used his fight money to buy two of every animal on earth, and then he herded them onto a boat, and then he beat the crap out of every single one. And from that day forward any time a bunch of animals are together in one place it's called a zoo! (Beat) Unless it's a farm!"