It has already been stated in this thread (and by me) that E-M78 and V22 have been sourced by some scholars to North Africa. How many times does it have to be repeated? The question is, what happened after that? When and how did it arrive in Europe?
It is perfectly plausible that along with all the other E that wound up in the Near East (in Natufians, for example), some became part of the Anatolian Neolithic which then moved into Europe. Pre-E-V13 could then have wound up both in Cardial in Spain and eventually in Sopot/Lengyel north of the Balkans. There, E-M78 could have eventually mutated into E-V13.
I still have unanswered questions about the sub-clades of E-V13. Is the pre-E-V13 in Cardial from the same branch as the one that led to the pre-E-V13 in Sopot/Lengyel in the mid-to-late Neolithic transition along with J2? Was the Sopot/Lengyel branch from a later wave of the Neolithic? We know that with time there was a movement of Iran Neolithic west and south, and also a movement from the south that went north and east. Could E-V13 and V22 have been parts of that movement, a movement that continued into Europe? Also, why and how did E-V13 suddenly explode in the Bronze Age, and where? Was it indeed picked up by steppe people? If so, where? We need more ancient dna and more analysis to get to the bottom of these things, imo.
There is still also a chance that E-M78 and V22 went directly to Europe from North Africa before the Neolithic but that is a long shot now, imo.
What is clear to me, however, is that Cardial could never be supposed to have picked up E-V13 or V22 in Egypt/Libya. That just isn't the route that Cardial took. Cardial hugged the North Mediterranean coastline. They didn't have the navigation skills to do anything else.
Furthermore, regardless of how people want to characterize Cardial, and whether or not Cardial people carried V22, it doesn't change the fact that all the EEF samples from Europe we have are very similar to one another and very similar to the Anatolian farmers who left for Europe. Ydna is a very small percentage of someone's genetic make-up. As I pointed out above, we have a I1 European farmer who is indistinguishable autosomally from G2a2 farmers, and I2a2 farmers carrying ydna of the European h-gs, who show little to minimum h-g ancestry autosomally. It's just the way it is.
People can believe what they wish, of course.
Btw, there are no hoaxes being perpetrated about E-V13 in Europe, or what is technically pre-E-V13. Why on earth would there be? You think all these scientists and researchers of all sorts from all different countries personally care one way or another? What difference can it possibly make?
Ed. This is, of course, the state of the data as of the present time. Should ancient dna turn up from southern Europe that shows that some Cardial people were substantially different from the rest of the EEF, then that would change everything. As of now, to the best of my knowledge the Cardial derived Neolithic samples from Iberia fit the general pattern.