“Harassment,” standing alone, is not illegal. The harassment in the workplace must be based on an illegal factor, like those listed above. In other words, the employer cannot harass the employee because of his race. But he can harass him because he just doesn’t like him.
If an employer treats an employee badly because of race, it is racial harassment. If it is because of sex or gender, it is sexual harassment, etc. But there is no law against general “harassment” or bad treatment of an employee.
Connection to Workers’ Compensation and Disability
If an employer treats an employee badly enough, that employee may be forced to take a stress leave. This may result in a workers’ compensation or disability claim. However, the employee still does not have a right to sue.