Aggression, being an expression of anger, and not the outcome of any reasoned planning, cannot serve any positive purpose. It should not, therefore, be a course that anyone should consider following.
If you have opted for some position due to your interest do not try to justify it in terms of Principles.
Difference, in providing an issue for discussion, throws down such a challenge and, by meeting this challenge, you are able to discover new areas of facts, new fields of progress. Minus difference, man would fall into an intellectual slumber and become little better than a statue.
Unpleasantness has been put into this world for man to learn the right lessons from it.
