How can we be Tolerant and Have Principles?

Tolerance and principles are two fundamental human qualities. We all,
as human beings, are special in a way. Each one of us has his own
destination, wishes, desires, and principles. However none of us lives in
a private isolated world, so she or he meets and interacts with others. In
order for relationships among us to be smooth, we have to be tolerant
of each other. Otherwise conflicts spring up.
Harmony of tolerance and principles would probably be an ideal
situation but is it possible and how could it be achieved? That is probably
one of the most difficult tasks of human society ever. I…