I didn't think he had already suicided, but I also am thinking there is a possibilty that the little brother has had a major "oh *expletive deleted*it! What have I gotten myself into?" and that's why we havn't heard a peep.
From what I gather, they came to the US when they were early teen/preteen, so I'm thinking they probably had a pretty good grounding in their culture and be young enough to still idealize even the radical thoughts they'd been exposed too. So, they've got their "ideal" past along with a solid dose of the current generation of American entitelment and, viola! crazy nutterbutters with a cause.
I like the one Uncle. I have a feeling if he could get his hands on those two boys, there would be a major beatdown. He is not happy.