Why the obsession with technicalities? The Sabbatarians appear to have practiced a religion so close to mainstream Judaism as to be indistinguishable to the outside world. No matter that they didn't practice two ritual central to Jewish tradition; ritual bathing (the mikveh) and circumcision. The people who matter in Judaism are not circumcised ( ie the women). And how many of them, outside of the Haredi sects go to the mikveh? For the most part, these Sabbatarians were righteous. Jews who disparage them or dismiss them, are self-righteous.
Jerusalem stabbing: One cop seriously wounded, two others suffer moderate wounds (Haaretz)
from the article: Discovering Europe's non-Jews who kept the faith