Blind Anger Festering

If someone makes you angry, by them just stating their opinion, who is the one at fault? The one stating their opinion? or you? Is it then alright to tip toe around someone because they might get angry at you for having an opinion? Is it not wrong to let them remain the same? Wouldn't they then never learn to co-exist in the real world? If you are allowed to go off because of what one thing says, and the people around you are careful not to upset you? How do you expect to have everyone in the world be so cordial to you? I think that doing something like that for someone is a hindrance to their growth as a person. True friends stab you in the face. And if you are a big enough person to understand that they are being themselves, and only want you to be a better person, life will go on, and you will be a better person.