Kat Von D caught heat years ago for an anti-semitic message she addressed to her former (Jewish) boss. There was also that whole Jesse James thing (they were engaged, remember?) and his past that includes him wearing a Nazi hat while giving a Sieg Heil salute. Granted, the latter happened while Kat and Jesse weren't together, but given the anti-Semitic feels of both situations, many folks think Kat Von D should've been cancelled a long time ago.
Source : https://thestir.cafemom.com/celebrities/212630/kat-von-d-anti-vaccination-product-boycott