Actually the only hate the US Vietnamese have are the CSVN. And this AF board isn't really an indicator of how US Viets are. Seriously who would use an message board as 'evidence' that it's representative of one group.
Hell most Vietnamese in VN or Viet kieu really don't know what a Jew or Do Thai is and they rarely come in contact with Indians. Even the Viet Buddhists and Catholics generally get along with a few minor conflicts here and there.
The only thing that is remotely true is about the Latinos. The Viets and the Mexicans have had some conflicts which is true.
Other than that I don't know where you get your info. Hopefully it's not AF.