You can always find somebody posting something stupid on Facebook.
That doesn't mean that Cruz or Rubio or Cantor have "lost their R-card."
No, but it does show just how much the Left has won and how much the Right has lost when conservatives start embracing and praising leftist icons like Mandela, MLK, etc.
And as far as I'm concerned, Rubio lost his legitimacy as a conservative as soon as he spearheaded the push for amnesty to illegals. He sounds just like Obama on immigration. This is yet another issue where mainstream Republicans have capitulated to the Left.