What are you basing that on? The only thing they do (so far as I recall) is protect themselves from being kidnapped. Everything else stems from the fact that Admiral and Co. want only to move the Ba'ku and will not accept any other course of action. They are the ones who will not compromise. Picard even offers one to Dougherty who dismisses it immediately.
Well, let's see. A century before, the Son'a tried to take over, so the Ba'ku banished them. Which is understandable in itself. Only did they not just banish them from their village, but from the
entire planet. They just as easily could have said, "you're still our children, live on the other hemisphere, you can live your life the way you want but don't come ever near our area again. Which shouldn't be too hard considering that we are only with 600 people". And they knew that over time, banishment from the planet was essentially a death sentence.
(* That is of course assuming that the Son'a weren't lying when they said they were banished from the planet to die - which we can't know for certain.)
Then, the first time Picard beams down to the village there is a Son'a officer there, and he also mentions that he is from the 'Son'a' command. So at that point in time the Ba'ku either already knew the Son'a were behind it all, and deliberately choose not to tell Picard their little history together, or they didn't even think of who those Son'a really might be until Picard discovered their DNA matched ('Gee, I could think of nobody willing to relocate us!') . The last would indicate that concern for the fate of their lost sons and daughters hadn't exactly been at the top of their minds for a long time.
So, no, I'm
really not impressed with their egotistical, self-absorbed mindset.
Also, there's no real indication that the compromise Picard suggests has been sanctioned by the Ba'ku. Though it isn't impossible either, seeing the reconciliation between a Ba'ku and a Son'a at the end of the movie -- the movie doesn't tell us either way.