All one has to do is look at the John Muhammed (Beltway Sniper) caper to realize that a relatively few terrorists, armed with the very hunting rifles much of the anti-gun crowd vow that they will (almost) never take away from American sportsmen, can cause far more destruction than a small bomb, anthrax in the mail or even a few jihadis with AK-47s.
So what's your point?
This kind of thing has been going on in the Philippines for some time now. Scratch a little harder, there is growing certainty that McVeigh and Nichols had some kind of contacts while they were in the Philippines several years before the Oklahoma City bombing.