To be argumentative or in extreme disagreement is to be

To be argumentative or in extreme disagreement is to be contentious.

To be contentious is to cause controversy. The concept, which has its origin in the Greek language, is linked to the tricks used to defend or offend a position.

The contention can be defined as the practice of the contestant who try to refute or approve a certain position.

the images of war are haunting

b - those executed came from every social and economic class