Since my nephew's a Marine over there and the antiwar wingnuts threaten to undermine what he's fighting for I'm getting a really bad trigger finger on this keyboard. I shouldn't use it so readily, instead pinging others and just asked them to add what they know about the guy without saying more.
As to the question "Should clients inquire about their lawyer's membership in groups which could have a conflict of interest with the case?" They shouldn't have to ask. The lawyer should be absolutely transparent on such things so their clients can weigh the pros and cons of using his services. He should be transparent even if he's the only choice the client has.
That's not to say that this gentleman is a member of anything or that he hasn't been transparent to his clients. I certainly didn't prove his membership in anything and only the clients can judge his transparency, so I requested that my post be deleted.
Prayers up the safety of your nephew. And thank you, FRiend.