Probably, so often the reason we (not all human beings but quite significant portion of them) don't like others' strange but harmless behaviors is not because we don't accept them by our moral standards, but because we are not comfortable about our own reactions. In other words, when facing some totally foreign or unconventional behaviors, we simply do not know how to react, so in order to prevent us from embarrassment of awkward reactions, we choose to blame others.
I myself is not completely from this ignorance, but at least now I know.