I didn't create the artwork, but I think a member of this board did. (I can't remember who.) The image has been floating around the internet for a while. I agree that it's excellent.
That shirt design could be trying to make a point that the music of Strata-East is no longer outsider music and is now staking it's claim astral and true American music and by extension real America.
If that's the intent, then that's a pretty radical notion itself