OP explained he’s in a four man company. There is no HR
If the boss is a jerk to everyone, he’s just a jerk.
It may have been on this forum, but someone once said “No one becomes Bishop because they are over-humble” or something to that effect. I would say that applies here, too by saying that no one starts their own business or becomes manager of a four man company because they are over-sensitive to the feelings of others. Sounds like this guy may just have a talent for alienating everyone.
Nonbelievers don’t know any better, so don’t take offense.
This is also very true. Sometimes, we are called to evangelize. Sometimes, we are told not to throw our pearls to swine. Maybe he’s a swine
Hostile Work Environment claims are not a joke . The manager would be coached at minimum.
Who’s going to coach him if it’s a four man company? And if it’s a four man company, managed by this boss with an absent owner, where does one lodge a complaint?
Unless he wants to try and press charges in some way which seems a LOT like a great way to get fired for something “totally unrelated”.
Yep, sounds like swine to me.

Share your God-given talents with someone else. If it makes you feel better, you can include your opinion of the man and his many instances of true nastiness as your decision to leave the company in a letter to the owner. I’d make sure I didn’t need his recommendation first though
People didn’t read? No HR
This is like one of my 7th grade reading comprehension tests, LOL
Speak to the company owner.
Also an option, although remember that, no matter how much the owner may like you, he’s out of state and the manager is in your workplace. Everyday.
Just pray for him, treat him kindly and behave with charity at work
While I probably wouldn’t go so far as actually being grateful (due to my own lack of holiness, not because it isn’t a good idea), I do agree that it is an opportunity. To make a complaint, to move on to another job, to ignore it or to offer it up. We are so loved by our Lord that He turns even the occasion of our being mocked into an occasion of grace. That’s…simply incredible. In that light, I could almost feel sorry for your manager that he lives a life without this incredible, eternal, omniscient God who not only loves His people devotedly, but even goes so far as to offer to turn their sorrows into positive action. And, yes, pray for your boss. Because he will live without Love for all eternity if he doesn’t wise up. And no matter how much of a swine he is, or acts like, eternal separation from God is an horrific price to pay…