Because treating those around you and yourself kindly is key to a positive feedback loop: * Being kind to others reflects back on how you and others see yourself and treat you. * Being kind to yourself reminds you of your own worth and that you are worth being treated properly
Because focusing on understanding both the motivations and the reasoning of another person increases your chances of * learning what you didn't already know * gaining new perspectives * being worth listening to in kind
Utter certainty makes extreme acts much easier to rationalize. Observing this stricture will prevent you from unjustly harming others and inadvertently deceiving yourself.
You deserve to determine your own beliefs. Question your beliefs as well. When you stop questioning things, you stop learning. Go out and find the answers you seek, remember the 5 Ws and the H! Who? What? When? Where? Why? How?
"Right & Wrong" "Good & Bad" are relative. People aren't as simple as "what you see is what you get." Try to look beyond words and actions for purposeful intent. Often times, people mean well. Look at the bigger picture.