He's likely got a friend higher up I'd be careful, over 50% of people are hired by association, you have to assume over half the people you work with have some informal association to somebody in the peripheral, usually how powerful that person is dictates now obnoxious these people are.
He's probably got somebody in his back pocket he wants to get a job for or whatever, gonna try to force out whoever, most immigrants are a part of a tight network and are constantly trying to add numbers to the better opportunities for more workplace leverage, it's just what people do.
Document everything, get witnesses, assume he's doing the same.
If you have to do this in a job, is it really worth keeping?
That first job I mentioned above sucked so bad because of the atmosphere. It was all wimpy beta losers from Vancouver and Seattle and one b1tchy western chick. I usually went home at night depressed and angry. When I went across the street and picked up a similar job with more laid-back co-workers, I had zero issues and things just flowed for the next 6 years. I also made a lot more money because I was legitimately enjoying myself and took every opportunity to spend overtime at work. (During the 'winter holiday', my boss penciled in over time hours for all the time we spent together in the office playing League of Legends (9 am to 9 pm)).
I had a security job here in the West where all the co-workers and I took care of each other. I spent 12 hours a day either sleeping, playing in VR or watching TV. I legitimately feel like I spent years in Skyrim and No Man's Sky and got paid for it. My co-worker brought women in and we had a little rave in the cafeteria after he 'accidentally' disabled the computer that controls the cameras. He had HOT women in this place his entire shift, banging and playing boardgames. Another co-worker spent his entire day watching and jerking off to porn, he was our 'commanding officer' so as long as no one said anything, everyone was cool. He eventually got nailed because he was using so much bandwidth, that someone at head office took notice. The government couldn't do anything about it because the facility was 'off the books', the guys were all veterans and the wiring system was from the 80's and besides, the facility technically doesn't exist anyway so neither did we. It took 4 years before they found someone who could get the clearance to fix it properly and because they kept sending government employees, it never got done. If you find the right people, the job can be an absolute vacation, and the money, is just an added bonus. You should consider working in government again, just in a different capacity. It took ONE young, recent ex-ARMY a$$hole to ruin it for everyone. He took himself and the job so seriously, he would sit and stare at the cameras for 12 hours without blinking, wouldn't let cops into the facility without paperwork, ordered everyone around, and confiscated all of our self-defense stuff to head office complaining it wasn't standard issue (and therefore illegal)... he was a typical brown nosing fvck and a model employee. He tried to pick up our one good-looking girl at the facility, I remember her walking off the job that day, she never came back. Of course, they promoted him. He insisted everyone refer to each other by rank... If Dwight Schrute had joined the army, it would have been this dude. Dude told everyone he was a chopper pilot but it turned out he was just some infantry retard, probably a reserve. Because he was our regional guy, everyone at the other facilities knew him, you'd only have to say his name and everyone would laugh and nod or curse and shake their heads.
Usually, I don't work in the West because of my anger issues. I can't be around social justice fcks without completely losing it. Thus I only work online, around people I really like/respect or when I'm in the East. It's better for the mind and body. You should probably define the terms you need to work and take those to your next job. Co-workers can make or break you.