Not with ISIS, but within Iraq or Turkey - sure. Of course the Kurds have every right to strive for the establishment of an independent state, like the Zionists did - but since there are other people also living in those lands, a solution is required that is also workable for those others.
It's not really that peculiar - they support refugees who flee their country, but they don't support said refugees claiming another country as their own instead, unless they are welcomed by its existing inhabitants. It does not make sense to them that Palestinians should pay the compensation for European crimes.
This is basically what I was talking about earlier, the demand that people accept the basic tenet of Zionism - the idea that somehow the Jewish people has an eternal, inalienable right to Eretz Israel that trumps the rights of other inhabitants - as a starting point of the debate. That's a very ambitious and unrealistic demand, much more ambitious than simply requiring that people acknowledge and accept the current reality of Israel as a multicultural but at heart Jewish state in the Middle East.
I agree that supporters of a one-state solution face the extremely difficult task of explaining how such a solution could ever provide the security, comfort and peace of mind that the Israeli Jews must be certain to have in any acceptable solution.
I don't agree that they are anti-Semitic. Not unless they show that they don't care about said comfort and security, or in some other way display a disregard for Jews and their inalienable rights.
I did not know that.
I don't think too many Europeans on the left, deep down, really believe that everything would be magically resolved if Israel just dismantled the settlements. But it keeps coming back to this question of different standards - they see Israelis as Westerners who should know better than to cling to their guns and religion and settlements, to paraphrase Obama, while the Palestinians as victims of Western colonialism get near-endless forbearance.
On the bright side, it seems inevitable that those views on colonialism, and the correspondingly low expectations towards developing nations, will fade away as the developing nations grow stronger and more self-confident, and as the West becomes more multicultural. Which in the long run should help to restore balance to views of the Israeli-Palestinian conflict - but by that time the situation on the ground may have changed a lot as well. For the better, I hope.