I believe murder is wrong, but some people don't-should I be more open-minded and tolerant of their lifestyle?

I used to speak out against murder because I thought it was wrong, but then some people enlightened me. They told me I should stop being such a narrow-minded, repressive bigot and open my mind. They told me I should be more liberal and tolerant and stop being such a prude. And I thought, "wow I sure learned my lesson"! Morals are so irrelevant today...let's wake up and join people in the 21st century- the birth of tolerance and enlightenment!