I can only see terrorism as being the motive here. A psycho couldn't keep this up, his mental problems would be a very exposed flank that the feds would have long ago exploited. These people are trained, financed, and well organized. They've got it scripted like the 49ers have their first 20 plays of the game figured out.
I do believe that there is a cop in the DC area directly involved.
Maybe, maybe not, an awful lot of civilizians died at OKC. Tim McVeigh seemed to be using all types and groups of radicals as a means to an end. I'm trying to remember back to all that was said about that situation. Wasn't McVeigh placed at Elohiem (sp?) City, a right wing quasi militia camp? And wasn't he seen there and in downtown OKC with not only Arabs, but with the son of either German Chancelor Helmit Khole's son or the son of his Defense Minister? They all seem pretty cozy for such a varied group.
In one place there was a disgruntled ex-soldier, right wing militia, arabs, and germans all meeting up in Eloheim City, all with their own agendas. We won't know for certain for years most likely. As with the deliberately botched OKC investigation that focused only on McVeigh and not the larger picture, this investigation will focus on John Mohammad and not his associates and connections, in fact they will most likely deny there are any connections or associates.