In general, I don’t think its a good idea to imitate the observances of religions that are not one’s own. For example, many Americans seem to admire some of the religious practices of Native Americans, like putting “dream catchers” up in their homes. But, I wonder: How do today’s Native Americans feel about Americans of European descent copying this practice without really understanding the culture, history, and belief behind it? Do they view it as something that makes light of their culture? It’s something that I think you have to decide for yourself.
You should also be aware that the presence of a mezuzah on a house is generally considered by Jews to be a declaration that a house is the home of a Jewish family. That’s a declaration that many Jews take quite seriously. To some Jews, a mezuzah on your house may be taken as a “false declaration.” I would suggest that you ask your Jewish friends what they think (
source, slightly edited).