GolemGorilla: You didn’t say he is difficult on you,just that he is hostile to Frumkeit. If that is so, set the right example that he may come to understand that his judgement is wrong. He did hire you, or allow your hire, didn’t he?
Most of these guys, who are hostile, do it out of guilt. At issue here, for the sake of your job, how does he treat you? Just don’t compromise your principles, That would just show him that we’re fakers. Just be mentchlach about what and how you do things and be respectful. He may come around.