In response to DamainAllen's comment:
I'm sorry but this is newsworthy. These are Cruz's followers and to some extent their reaction speaks to the type of person he has targetted as his base. Not everyone has to love Mandela, there are many criticisms that are just, but the venom and hatred espoused by some is clearly not rational criticism. Cruz and others should be mindful of the seeds they sow as they attempt electoral success. It is easy to poke the bear, not so easy to deal with it once it is fully enraged.
Damain, take a look at the similar response to Maggie Thatcher's death from the left. Glass houses and stones...