Ah, the Lord freed me up to study alchemy earlier this year so I see the duality of gold/silver, sun/stars, and Father/Son represented; obviously due to the latter that cannot be a Jewish hexagram, also too acute. Q uses Y as if represented by antlers as well. Funny though that the idea of harvesting gold from base metals has been abandoned (and left to reputable science, where Seaborg did it from bismuth in 1980), while at the same time it does appear that modern alchemists still retain the notion of harvesting gold more efficiently from base papers (formerly their Ponzi-style treatises, now banknotes). Seems that in the past the alchemists had more Christians than Jews nominally, so I don't know that that has changed any.

Add: I now see that image also has blood/water dualism, which is odd because, even though the Johannine comma identifies this with the Father/Son dualism by no later than the 4th century, I don't think of the Father as the blood side as this illustrator does, because that would be Sabellian patripassianism. So that makes it even more specific to heresy from Christianity, and not to any use of hexagram for Judaism at that time. I still think that "Y head" refers to more than dualism or gnosticism, but if I review Q on the subject that may indeed be the ultimate root of where he is going with it. But he's also implying that lately there are Satan worshippers using two-headedness as a specific symbol of something and I don't think it's alchemy or gnosticism.

A quick check shows that Ezekiel 21:21 uses the Y imagery of a trivium or fork in the road, where Nebuchadnezzar used divination to determine whether or not he would take the path of destroying Jerusalem (he did), or Ammon instead (he didn't). This is "the head of the two ways" and is a potent symbol of choosing destiny. The king used idols and offered a sacrifice (consulted the liver) and his advisors thought that Jerusalem was the wrong decision, but they had all been sworn to obey the divination. Ultimately this will be behind the modern Y head but I'm still not clear on the immediate application.