if he wanted to honor his ancestors, he should have scalped his enemies...
//sarc
He has a family member that does have a grudge against the US,
A person identifying himself as Fryberg’s cousin tweeted the following:
https://twitter.com/BradleyFryberg/status/525736127165394944
Fryberg posted an Instagram last January comparing the number of Americans killed on 9/11 with the “12 million Native Americans killed by Christians.”
from :
http://heavy.com/news/2014/10/jaylen-fryberg-pilchuck-high-school-shooting/
found on a later thread on this subject