The reference is not to Judaistic ritualism, but to semi-Pagan philosophical speculation.
On the Judaistic hypothesis, "righteousness would have been of law."
And to this footing the Galatian Churches would be brought if they yielded to the Judaistic solicitations.
This measure was the boldest and the only effectual means of combatting the Judaistic propaganda.
For this, and for no other reason, it was demanded by the Judaistic party.