Would Jewish people be offended by a Catholic wearing a Mazuza?

Answer 1

Jews would probably not be offended by catholics wearing a mezuza. A Jew would not wear a Mezuza, since it's place is in the entrance to a domicile (on the right). Most probably a Jew would be amused by the ignorance of the catholic in using the Mezuza as a pendant, and attribute it to a lack of knowledge, or a misguided belief in spiritualism.