And if ye salute your brethren only - of the same nation and religion with yourselves.
what do ye more than others? - what do ye uncommon or extraordinary? that is, wherein do ye excel?
do not even the publicans so? - The true reading here appears to be, “Do not even the heathens the same?” Compare Mat 18:17, where the excommunicated person is said to be “as an heathen man and a publican.”