Dude, calm down, the splitters thing is a reference to Monty Python's the Life of Brian and the fact that the Samaritans and Jews split over where the proper place for the temple is and who could be a priest. Thing is, the Samaritans never left the levant, the Jews on the other hand, at least their leadership were removed to babylon. How would those Yawhehists know where the original and proper location of the temple is any more than the folks that never left.
From the Wiki you claim says there was no temple at Mount Gerizim.
There has been a temple there for millennia.
As to the highlighted bit, that is literally the biggest difference between the Jews and the Samaritans.
en.wikipedia.org
Samaritan, member of a community, now nearly extinct, that claims to be related by blood to those Israelites of ancient Samaria who were not deported by the Assyrian conquerors of the kingdom of Israel in 722 BCE. The community numbers about 800 individuals.
www.britannica.com
The Rabbis claim the Samaritans came from Mesopotamia during the Assyrian exile, the Samaritans claim they were natives that weren't conquered and exiled by the Assyrians. If the Samaritans are correct then they are more likely the legitimate form of Yahweh worship.