"I already showed that the Law does not necessitate impurity; it is given to deal with impurity. Therefore, obedience to a ritual cleansing law does not prove impurity, just as Jesus's baptism does not prove His impurity."
You just gave your opinion that the Law does not necessitate impurity without any factual basis for the conjecture. If there was ever "begging the question" it was your conclusion.
Prove my statement wrong.
Did, or did not, Jesus keep the Law? Yes. Was Jesus impure? No. Therefore keeping the Law does not necessitate impurity.
-A8