A question

Hi
Today I realized something:

I have had more problems in my life with muslim people than with any other people. I want to ask what is the Islam position about Christians. Do they respect Christians? WHat is the islam position about liying and the truth?

I am Catholic Christian from Latin America.
Several years ago when I was in my Country I was deceived and hurt by one man who pretended to be nice to me and just wanted to take advantage of me. He is muslim.

I have had to muslim roommates and both of them have made mi life miserable.

The first one was very angry all the time, arguing with many people and always yelling.

The second one lies a lot, she even told me she plays dumb. She is very concern about money and always very selfish.

I also had a muslim landlord who was very disrespectful and very greedy.

I do not want to make generalization abot all the muslims, but I can see a tendency at least regarding my life.

I do not want to be disrespectful, but I want to learn what the Coran says about interrelationships with other people and the right way to treat others.

Thanks in advance

Zule