They could begin by recognizing their Messiah out of the line of David. ;-`
[sarcasm]Of course. It's so obvious! I mean, the Bible (ie, the "new testament") says J*sus is the messiah, and since it's "self-evident" that the "new testament" is part of the Bible (after all, isn't it that what Thomas Nelson says?) that's all the proof one needs![/sarcasm]