Firstly, you failed to explain the meaning of Sectarianism for those who are haring the world for the first time.
I have to look up the word on google. It becomes irrelevant when the main idea of an article is not made clear.
Sorry, I am not a native English speaker. Sects or cults are groups of people united by a specific religion.
Secondly, you didn't clear the air on the co-relation between friendship and sectarianism.
I just tried to explain that if talks about politics and political science were allowed everywhere, people would easily find friends everywhere, because talks about politics can be an excellent common goal which can unite people.