Blac Chyna, who shares a daughter with ex-boyfriend Rob Kardashian, has backed the mocking tweets posted by Kanye West against his mother-in-law Kris Jenner and said the comments shouldn't be dismissed as crazy.Blac Chyna, who has been in a legal battle with Rob Kardashian for several months now, released a statement through her lawyers to show support for Kanye West, reports Page Six.