Yeah, a lot of people at the XKCD forums didn't like this one either. I think it's because, aside from the whole deity thing in Return of the Jedi, there isn't really anything to
get. It's just a bizarre juxtaposition God's long-winded introduction for himself at the burning bush, and C3P0's long-winded introduction for himself in A New Hope.
And thinking of the booming voice of the L
ORD being substituted for Anthony Daniel's voice in the second panel made it all the better.
as for the alt text, LO-M is a pun of
Elohim