There are lots of good people in the world (as well as lots of the other kind), of every religion. You are blessed to know two of them.
The big question is: are they good people BECAUSE of the teachings of Islam, or IN SPITE of the teachings of Islam? Do you think your two friends wouln't still be good and kind people if they were Christians, Jewish, or Buddhists? The big issue is not whether good people exist in whatever group, but instead what direction the group's ideals and culture tends to turn people toward?