You simply won't. You can't quit and get unemployment in Michigan unless there is constructive discharge. Simple bullying is not enough. Find a new job then leave.
My answer to you question does not constitute legal advice. Only an in person or telephone consultation will result in an attorney/client relationship. Call me at (313)402-0853 to discuss your matter further.
A hostile work environment generally requires a showing that some condition of employment arose out of membership in a protected class such as race or gender, or that you were personally targeted. It is unlikely that mistreatment of another which is not based on his or her membership in a protected class would constitute a hostile environment.
As indicated by the other attorneys, it is exceptionally difficult to get unemployment if you quit. You shoudl check out the link below (I think). It dicusses the cases and various laws relating to receiving unemployment if you quit. The best piece of advice I can give you is to ask (perferrably in writing) that the boss create a more appropriate work enviroment. Emphasis that the swearing and violence make it difficult for you to feel safe and do your job. If you complain in this manner a few times adn the enviroment does not change, you may be able to show the necessary factors to show your resignation is attributable to your employer! Good luck.
Each employment situation has unique facts and circumstances. This means that information and advice cannot be taken literally and should be used as only informational. The information provided here is not legal advice and should not be interpreted as such.