In his bluntest rebuke yet of Cyril Ramaphosa, Thabo Mbeki has dismissed the president's warnings on illegal immigration as speculation dressed up as policy. The timing matters: Mbeki spoke just before June 30's nationwide protests, which cost the state R600 million to police and will now recur weekly through November's local elections. Mbeki's actual argument reaches back to his own 2008 ousting, which he blames on a "counter-revolution" that s…