I didn't know thri-kreen had any interest in gods, especially since all kreen everywhere ultimately originated from Athas (which their "primitive" spelljamming forebears departed during an age of high psionics/magic during which "superstitious" gods and priests were disdained). I haven't quite pinned exact dates or timelines on these events, since they hinge around information I lack about the "elders" or "first ones" of ancient spelljamming histories. In broad strokes, I think Athas was once accessible on the Flow, but has become disconnected and isolated from the spacelanes while the crystal spheres have drifted over the millennia like bubbles floating on a river.
Where is this information about Jergal found? Especially since he might (in terms of calendar correspondences) be older than the first waves of kreen migration.
Jergal wasn't worshiped by the Thri-Kreen that I know of...the article about him was in a magazine. I'll look for it...if someone doesn't get to it before me.
That article is also from a Polyhedron. I'll let you retrieve it.
I can't find it...I've relocated so many times I'm totally unorganized. :-/
I remember that there was a tie between Jergal and Spellweavers...and because he was a multi-armed God he was connected to the Thri-Kreen as well somehow...discouraging that I can't find the material.