Honestly, the idea that R1b-U152 is supposedly exclusively East Germanic does not make sense, either. How do you explain British U152? It cannot be Germanic in any way, since there's virtually no R1b-U152 in the homeland of the Anglo-Saxons. Furthermore, there never was any East Germanic presence in Britain.
In my opinion, the most plausible hypothesis is that U152 can be originally tied with the Urnfield Culture of Bronze Age, and that the cummulative effect of later history explains the rest.
There is really no problem there, at all..
I dont think you would see any significant U-152 / s28 in modern english populations if not for a little thing called the Norman Invasion.
The total U-152 presence in Britain is what.. 3-4% (if even that) of the modern English Y-dna? The Normans included a composite of almost every French regional population but in particular the Flemings, Northern French, and in all these regions of France you have a giant army of Goths who led the attack against the Hunnic army.
As time wore on, these Goths and their related migrating populations became part of the Frankish nation, and thus part of its tributaries including modern French, Belgian and Fleming/Dutch populations - The bowmen of the low countries in particular was critical to the Normans and all these ethnicities received a share of the Gothic and eastern germanic forces genetics in their ancestries.
Thus, a small portion of modern 'norman'-descended english are going to have Frankish ancestry from these Gothic/eastern germanic components that merged into the Frankish nation, and share the same migrations and originate from the same regions in the east as the Lombardy U-152 settlers.
If a man should commit an immorality with a female slave ''belonging to thenations'' he must pay her lord twenty solidi, if with a Roman, twelve solidi, the Roman bond-woman
being of less value than the slave of Teutonic or other origin. This is the only reference to Romans as
such in Rothari's laws. If a slave or aldius married a free Langobard woman, her relatives had a right to
slay her or sell her and divide her substance.
The Lombardic germanics passed what were in effect racial laws, that did not offer the same protection to Italians within the Po Valley, and in particular punished any italian male who married or consorted with a germanic female. Thus, its not likely that a majority genetic component of this races Y-dna would account for the vast majority of the male Y-lines in the Po Valley, unless it was from a larger Italic population that reinforced itself from the Byzantine/Roman-held lands over time..
the problem with that scenario is, these outlying populations do not show that high a pct for U-152, and as with the Swiss lands at 15-20% U-152 actually look like they are Recieving U-152 from the Po Valley male rulers, as opposed to being the well-spring of this Y-dna into the germanic held regions.
The Romans had then no courage
to resist because the pestilence which occurred at the time of Narses had destroyed very many in Liguria
and Venetia, and after the year of plenty of which we spoke, a great famine attacked and devastated all
Italy. It is certain that Alboin then brought with him to Italy many men from various peoples which either
other kings or he himself had taken. Whence, even until today, we call the villages in which they dwell
Gepidan, Bulgarian, Sarmatian, Pannonian, Suabian, Norican, or by other names of this kind.