How can I help my friend get rehired and get his job back?

I have a friend. Let’s just say his name is Josh (fake name). We are both into our culture and heritage. We live in the United States but have European ancestry. I am not racist but I suspect that Josh is. We both worked at the dollar store and the former manager was Caucasian. Josh was an efficient worker and he was cool with the manager. The manager eventually transfered to another store and he was replaced with an African American manager. Me and the other employees didn’t care. At first I didn’t think Josh had a problem but I noticed his energy dropped and he had a sour face most of the time. It seemed like he didn’t like the thought of taking orders from an African American because when the manager told him to do something Josh often responded with an attitude. Everything the new manager told him to do he did the opposite or he did it inefficiently. I noticed that his work rate dropped. When the manager told him to put 4 boxes of merchandise on the shelves he only did 2. (He always used to finish stocking boxes. Now it is rare when he finishes.) He is no longer friendly to customers. He is cold like a robot. He always complains about the new manager even though he’s not better or worse than the previous manager. One day we had an inspection and Josh purposely came late. ( I know because he drop me off on time but he left and came back 40 minutes later so he was 40 minutes late.) When the manager asked him why he was late he said that his car broke down. While we were cleaning for the inspection he was cleaning slowly and purposely using too much bleach to clean the floor. When the manager question him on the bleach amount Josh lied and said it was a mistake. I know he lied because he did it again in the bathroom. Josh was supposed to have a thirty minute lunch break but he took an hour off. When the manager questioned him Josh said that he fell asleep by accident. (Josh lied. I went in and out the room to get supplies several times and saw him awake on his phone. The next day Josh was purposely late again. The manager questioned him. Josh told the manager that he was late because he put his clothes in the washing machine at the Landry mat but he didn’t realize how close it was to work starting time. He had to wait for the clothes to wash and dry because he didn’t want to leave because someone might steal the clothes. (Josh could’ve avoid it because before he took me to work he stopped at the laundry mat. I told him that he should was his clothes after work because starting is only ten minutes away. He ignored me. He dropped me off at work and went back to the laundry mat.) Eventually I asked Josh if he was racist and he told me know. One fateful day Josh saw the manager walking out a few boxes of frozen food. Josh chased the manager down and accused the manager of stealing. Josh was aggressively talking to the manager until the manager showed Josh the receipt. After that the manager cut Josh’s hours down from 25 to 30 to 3 to 4. Soon the manager didn’t put him on the schedule at all. Josh attempted to get in contact with the manager to put him back on the schedule but the manager never replied. Josh was forced to quit but he didn’t have luck finding another job. He constantly ask me for money and he wants me to help him get his old job back. How can I help him get his job back?