Two major faiths see it as more than a 'tempest in a teapot.'
On some level the CJCLDS acknowledges this is disturbing to people and their families, as The CJCLDS apologized to Simon Wiesenthal for baptizing his deceased parents after negotiations resulting in the CJCLDS agreeing not to baptize any more Jews.
When Elie Wiesel, the Nobel Peace winner, found his name on a database that is used for potential proxy baptisms. He was very much alive and outraged by the insensitivity.
Because in 1995 the CJCLDS agreed to stop posthumous baptism of all Jews and has been caught red handed in breech of that agreement.
In 2008 the Vatican instructed diocesan officials not to provide information form parish records to the CJCLDS for the same reason.
So much for considering this practice good faith or gestures of goodwill. They are continuing to do something they know is objectionable to people of other faiths, even after formal negotiations.
You're right in the respect that Jews are decidedly 'un-Christian.'
Hat tip to texasflds