Ever find anyone who said, "hey, this is just what I think, I don't need a reason," or "it's just common sense that...[fill in the blank]?" No? Well, you need to get out more.
Most of the interminable debates that roil the world are based on fear, anger, hatred, bigotry, ego, etc. all garbed in the moral superiority of common sense and reason.
I collect quotes, and it seems a lot deal with just this issue, so I'll let others finish this post.
"People demand freedom of speech to make up for the freedom of thought which they avoid." Soren Aabye Kierkegaard
"A lie gets halfway around the world before the truth has a chance to get its pants on." Sir Winston Churchill
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." Albert Einstein (1879-1955)
"It was impossible to get a conversation going; everybody was talking too much." Yogi Berra
"A great many people think they are thinking when they are merely rearranging their prejudices." William James
"When ideas fail, words come in very handy." - Goethe
"Noise proves nothing. Often a hen who has merely laid an egg cackles as if she has laid an asteroid." Mark Twain
"Let us make a special effort to learn to stop communicating with each other, so we can have some conversation." Miss Manners (Judith Martin)
"Everybody gets so much information all day long that they lose their common sense." Gertrude Stein
"In all matters of opinion, our adversaries are insane." Oscar Wilde
"The real problem is not whether machines think, but whether men do." B.F. Skinner
"The public has an insatiable curiosity to know everything. Except what is worth knowing. Journalism, conscious of this, and having tradesman-like habits, suppliers their demands." Oscar Wilde
"Logic is like the sword: those who appeal to it shall perish by it." Samuel Butler
"Man is a rational animal who always loses his tempter when called upon to act in accordance with the dictates of reason." Orson Welles
"Many people would learn from their mistakes if they weren’t so busy denying them." J. Harold Smith
Couldn't have said it better myself.