2) because of left-wing opposition to Israel and the West and support of third world Arab states,
This might be a good example in Europe, but both sides of mainstream US politics support Israel over its neighbors, fairly heavily. The fringes don't (on both ends), but the main body of political discourse does, and that takes away the support for your claim.
No, it still counts. If both groups support it, it still isn't specific to progressive political views.
Suppose I told you that I knew for a fact that the following statements were true:
You’d think I was crazy, right?
Now suppose it were the year 1901, and you had to choose between believing those statements I have just offered, and believing statements like the following:
Based on a comment of Robin Hanson’s: “I wonder if one could describe in enough detail a fictional story of an alternative reality, a reality that our ancestors could not distinguish from the truth, in order to make it very clear how surprising the truth turned out to be.”1
1Source: http://lesswrong.com/lw/j0/making_history_available/ewg.