Views. And being able to justify them
How do opinions and views getting formed? On the matter of a sight. How far and aware they are capable to look across. By acknowledging things, comprehending them. By capability of structuring and composing complete statements and forming final structures they can see of what has happening with them. If statements had been composed right, they make the right understandings. If not, they are hard to re-build their views.
Never bother yourself to argue with silly people. Just walk away and try to focus on something else. By convincing them, either way, you are wasting your time, and you will not encourage them to change their objectives. Life is just putting them in the right direction, so later they can learn things by own mistakes.
Everybody has the right for an opinion. As long as one can prove it, there is no problem. But, when one cannot, he must be able to change his views.
Its difficult to change views, but views must be stable, proven and have a solid background to have opportunity being approved. Otherwise, they will look silly.