If you are on tribal land you are under their jurisdiction. This law now takes that jurisdictional prerogative away. It's the "nice white way" of saying, you Natives just don't care enough about your womenfolk, like us white guys.
Uh, no. Not even close.
By the way, do you have any informed opinions as opposed to ignorant ones?
For those wanting information on the jurisdictional issues (and Damo, I recommend you read it) go here:
http://www.fas.org/sgp/crs/misc/R42488.pdf