Lesson # 9 The only accurate generalization is: No generalization is accurate. (So beware of all my posts from the beginning of this blog.)
Lesson # 10 It's always a good idea to be kind to a person who has done you no harm. Even if it's easier not to. Why? you ask? Probably because it's the right thing to do, and there's no nobility in bullying an easy target.
Also, remember the occasions when YOU were the easy target and kindness was shown. Remember the immense wave of gratitude that you felt roll out of you to the other person, and think that someone else could be feeling that way about you.
Wouldn't that be nice? So be nice.