Ahh, but the washing of the hands is Talmud, not Torah, and directly disputed by Yeshua:
Mat 15:1 Then came to Jesus scribes and Pharisees, which were of Jerusalem, saying,
Mat 15:2 Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.
Mat 15:3 But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
(e-Sword:KJV)
HOW they transgressed the commandment of YHWH is that 'washing the hands' was not a commandment of YHWH... Do not add to, nor take away from...
Do wash your hands or leave them dirty when you eat ? If you are a parent, do you teach your children to wash their hands or leave them dirty when they eat ?
I don't think that was the reason. Jerome, who was Fourth Century, explained the ritual washing was from Psalm 26 and he would have been very aware of the story from the gospel.
I will wash mine hands in innocency: so will I compass thine altar, O Lord: