What should i do about my landlord?

Maybe she is not to be blamed though she should be tolerant as Christians claim to be and that they love their enemy

so you show her the real Islamic Character of being kind and courteous

Bring her a gift of good will

and seek Allah's help to break up an ice blocks

41:34 The good deed and the evil deed are not alike. Repel the evil deed with one which is better, then lo! he, between whom and thee there was enmity (will become) as though he was a bosom friend.

But make sure that you are the best of neighbor and the best of tenant that anyone would love to have.

A landlord or a manager should know how to behave in a professional and courteous manner to everyone. Even if they have personal feelings about something it should certainly never come out in business. This is a outright disgrace to treat you in such a manner. Maybe i'm the exception to the rule but I was not raised to be a racist or hate people because they dress or believe different than me and I take that into my work and every other aspect of my life.You may never win her over but whatever you do,just continue to treat her in a kind and positive manner. As a manager I feel compelled to apologize for her behavior because we are not all that way.

Unfortunately there is no law against being ignorant and rude. There is not much you can do about it, since she is not breaking any laws. If she has a supervisor you could try talking to them.

I'm really sorry you are being treated that way and that we cannot be of more help.

Yes conduct all business in writing and ignore her. Crude and rude is her problem and you should not worry about it.