Communication has two parts - the listeners and the speaker. Each has a job when conflicts are being talked out. Each role should be taught. Students should be taught that since each person is different, we will have different thoughts and opinions. Therefore, something that may be done or said by one person without meaning harm could be interpreted by another as hurtful.
Most jobs require more than one tool.
Others are not. This can prevent a conflict from getting worse. Flip a coin, draw straws, or any other such luck device. Find a way for all to use or enjoy together. Problem-solve by thinking of all the possible choices and deciding on one upon which both people can agree.