Prejudice is when you judge someone before you fully know the content of their character. Discrimination is when you act on your prejudice.
This social class can often be called the "working poor". This group may also be called the "lower" or "under" class. The majority of the working poor work in service jobs, like waiters or waitress, unskilled labor positions, farmers or maids and other minimum wage positions with two or three jobs that have little to no extra benefits. The majority are also relatively uneducated, with less than 50% graduating high school.
Hamlet's pain, fear, and self-conflict make him go mad.