When other employees quit or walk out on their job they get their job back but if you do you don't get your job back Is this discrimination?

Answer 1

An employer could have a perfectly good reason for not rehiring an employee who had previously quit. Perhaps a replacement has already been hired. It would be unreasonable to fire the replacement in order to rehire the previous employee.

The term discrimination is usually used in the context of some unfair exclusion of an entire group of people, the most usual case being racial discrimination. An employer might discriminate against African Americans, for example. But that would not apply in the case that you describe. If this employer did not like African Americans, then an African American would not have been hired in the first place, and therefore, would not then have been a position to quit and then ask to be hired again.