Black clothes are also known to Jews as a symbolic expression divrai yirah shomayim, which means “fearing heaven”. To some Jews life is very serious and the Jew is always conscious of his relationship to G’d. Therefore black is worn so as to avoid frivolity and also place distance between the wearer and everyone else.
Jewish Clothing
Do the orthodox Jews wear it in order to become gods?
Do the orthodox Jews wear it 24/7 as a vow resulting from a secret ceremony?
Orthodox Jews wear it openly for all to see - why do mormons hid it?
You comparison fails BM.