How can I over come insult, incited hatred, racial...

You have to file a complaint at your company's administration about your supervisor's act of threatening. Inform them of your case, so that they can take measures on you being discriminated by your employer

According to the Federal Law No. 2 of 2015 on combating discrimination and hatred, a penalty of not less than five years' imprisonment and a fine of not less than five hundred thousand dirhams and not more than one million dirhams shall be imposed on either person who committed an act which would cause any form of discrimination in any way Expression or using any means