Believers can be cruel,too, because many are without wisdom, and you must take control of your emotions one step at a time. If you find yourself getting angry, stop immedately. We all lose our cool, and I'm human too. Actually, I resonate rather strongly with your feelings and emotions.
People are always uncomfortable with circumstances and things that they do not understand. I've encountered people that were considerate while others were rude and hurtful. If you confront the rude and hurtful with kindness or at least silence, it will turn the moment to your advantage. Hate will only produce a greater hate. Peace will always return to you, and on the other hand bitterness and hatrd will consume you.