Most of my closesest friend are second and third generation. I think the main difference is that poly culture instills pride in that culture and unwavering devotion to family and friends. They stay involved in the culture through dance and traditions. So I have seen that it takes longer to have the culture lost. That said, I cannot explain the Tongan gangs in Utah. They go against everything that the culture stands for. I know there are just bad apples in every bushel but I really don't know why it has reached the level it has. I have to assume poverty and too much pursuit of the dream must play a part. I wish I could get to these kids and refocus them back where it allows for success instead of misery. Anyway, I don't know if there is an easy answer but look at Pilimai, Tapusoa, Tautu, and such. Most of those kids are third and fourth gen kids and still seem to be going strong culture wise. I think as long as the kids stay close to the church and family (or just family for non LDS kids) they will stay close to their culture and continue to be successful. I think when they stray from that they can end up going down a path that leads to struggles etc.