That was my thought, too. Maybe they were trained to do this if caught, so as to not reveal anything about the other terrorists.
I too figured he killed himself so as not to give away names, etc. Sounds like his bookstore was "eco-terrorism central".. But then I wondered if these vegan types had that mentality in them? When I think terrorism and suicide my thoughts don't jump to granola chomping dudes and dudettes.
Although I don't think the muslims could stand these types of folks (either!) - they both have a similar cause in bringing down the "Great Satan".