That's decent and interesting criticism. Indeed, Alinsky appears to have been a hardcore Syndicalist, and both Buckley and me are to the right of him, although Buckley's a lot further. However, that last one is very dubious to me:

I think that America, viewed as a nation, is the most humane nation in the experience of the world. I think there is more genuine concern for the poor, for the underprivileged, for the weak in America than we've ever seen in the history of the world. And I see you trying to fire and establish -- and disestablish the order that made that possible.

Since Marx, leftists have probably heard this kind of argument in most debates: advanced civilization generates - or will eventually - so much charity in all its forms (through both tradition and individual kindness) as to cure most of the lower classes' problems and thus make many concerns of unfairness and inequality irrelevant.
Alinsky clearly understood the problem with that: charity is in itself a status race and a status pump; it can be wielded with malice and used to keep people down. Just look at Africa and how we're trying to drown it in money instead of coming over there en masse and applying real help, manually. (Which is also problematic status-wise, but at least it might actually improve a society.)