Just want to point out that "judging the worthy" is Lash's motivation IN THE COMICS, by no means it has to be the same in the show.
True, but motivation was offered as part of the evidence in support of the hypothesis that Andrew is Lash earlier in the thread. I just do not think that that motivation fits Andrew's profile.
Still, if that's not Lash's motivation, what might it be?
There are not many plausible options.
For example, we can rule out killing for sport, or just instinctively. He says he is "necessary". But necessary for what?
It's not to protect the public (the couple of inhumans were no threat to anyone; plus, Lash does not seem to care about humans).
Maybe he wants to keep some other groups of inhumans hidden?
But that would not be Andrew's motivation, either.
So, I will add another piece of evidence against the hypothesis that Andrew is Lash: No plausible motivation for Lash seems to fit Andrew's psychological profile. Neither does Lash's utter disregard for human life (e.g., he killed a man in the hospital just for not telling him where to find the inhuman - something that the guy in question almost certainly knew nothing about -, and then even mocked the dead guy saying "never mind").
But if anyone believes otherwise, I will just ask the following question:
Can anyone come up with any motivation that would fit both Andrew's psychological profile and Lash's actions?