Geographical Errors Within The New Testament

It is well known that the Gospel of Mark contains numerous geographical errors. This is summed up in Kummel’s classic, … It appears that your web host has disabled all functions for handling remote pages and as a result the BackLinks software will not function on your web page. Please contact your web host for more information.

Washing Of Hands Practised By "All The Jews"?

There is a problem with this passage, however: the ritual washing of hands was obligatory only on the priests! So the question remains, if the author was a native of Palestine and a Jew, then how was he so ignorant of the Jewish customs and made such a fundamental error regarding a practice that was only limited to the Jewish priests?