Subject: Re: Headline:Searching for a motive
No, I meant for his registration as a Republican.

Gotcha. I think the same point still applies. There's no reason to assume that this man had any coherent political philosophy at all - or that if he did, we could discern it from something like a $15 donation or voter registration. Neither of those actions require a ton of thought or commitment, so who knows whether they offer any real visibility into this guy's politics - or if he even had any politics at all.