Question

What does dissent, persecute and tolerance have in common ?

Answer 1

The three of them, dissent, persecute and tolerance are three different manners of reaction to another person's opinion, viewpoint on some specific issue or way of life, specially regarding those which differ from  the own one.

Tolerance implies fully accepting and respecting different viewpoints, and even valuing such diversity. Dissent consists on replying with different arguments and ideas. If persecution is performed, the differing opinion is repudiated and tried to be silenced.

Answer 2

One thing that dissent, persecute and tolerance have in common is that they are all things that take place in civilized societies, either through a court system or in social structure.