The last time a US Government tried active assimilation policies, it led to actual acute starvation conditions at Menominee and Turtle Mountain, two of the three large communities chosen as a pilot project (Klamath was a qualified success, actually, and the numerous tiny communities pressganged into the project were much more assimilated into mainstream America before, and thus suffered far less). And that was in the 1950s. "Stockholm Syndrome" indeed.
Could you elaborate? I'm not familiar with this.