Interesting, geographic influence was my first guess; the vast majority of my kids are Mineiros so I was wondering if there was a connection to MG or Belo Horizonte. If there's a Lula crowd in my school I haven't seen it and I've got one eleven year old who has, since early September, been walking around the school telling anyone who will listen that "Lula is a dirty squid" (I know this is a translation of 'Lula', but this is a kid on the spectrum and I think this has become a stereotypie for him rather than carrying any meaning, but it must have originated in the home).

It's funny that you mention indigenous policy because the thing that really got me wondering about this was spending my lunch break today reading this article about the murder of a journalist in FUNAI territory.