Creating a class treaty - Social studies

In our class there are approximately 20 people engaged in to making a class treaty. 

The class treaty includes a: preamble, first article, second article, third article. Our class have already completed the preamble on the 30th of October. During the making of the preamble a lot of arguments were formed just so that our entire class could agree on a statement that fits for both students and teachers. Because of all the arguments, it started to get a bit heated up. Some students really stayed true to their opinions to the point where they got a bit offended of other opinions in which they did not agree with and so arguments turned into personal insults. Who knew it was so hard to write up a treaty so everyone comes to an agreement.