Tolerance as such is not a recognized human right, but it is closely connected to human rights. Why have the right to free speech or the freedom of religion if your speech or religion is not tolerated?
Another person, another opinion or another way of life is not just something we have to tolerate like we tolerate bad weather. Social life is not completely negative or meaningless. The company of other people is not only a burden we have to tolerate. The company of others—especially the public company of others—is beneficial because it is necessary for thinking and knowledge. See my post on Kant.
The other person is a necessary part of each human life. We not only tolerate the other person, we also use him, follow him, contradict him, discuss with him, help him etc.
Diversity and tolerance of diversity can be very beneficial because they make it possible for us to learn from others, to debate with others and take into account their objections and counter-arguments—whereby we can come closer to the truth. We can take advantage of diversity and of tolerance of diversity, because diversity means other opinions and criticism of our own opinions. The school of tolerance teaches people to reap the benefits from conflict and difference, and makes people suspicious of all efforts to eliminate conflict or to let it degenerate into violence. Tolerance is more than just a restraint on violence. It contributes in a positive way to life.
Diversity is not, however, something static. Tolerance does not mean accepting diversity as it is and as it will always be. The purpose of tolerance is not to make opinions coexist without interaction of any kind other than bare acceptance, and acceptance is more than an armistice necessary to keep the peace between interests of which no single one is strong enough to impose itself. It must be possible to convince other people, to create a common will, a general interest or even a consensus that is limited to a small group. The function of tolerance is not to separate people and opinions, nor to maintain differences as they are. Its function is to make confrontation between opinions possible. Tolerance keeps aggressive people out of each other’s way; it does not keep people as such, let alone points of view, out of each other’s way. Confrontation can, of course, modify points of view and can eliminate (or enhance) differences. We have opinions on opinions, we judge, we convince, we become convinced, and we change our opinions accordingly. That is why difference in a tolerant world is something dynamic.
It is not because we tolerate someone or some point of view, that we do not have the right to say that this person is mistaken or the right to try to convince this person. Without the possibility to convince, the right to free expression loses much of its meaning. The pleasure of expressing an opinion, showing off and expressing our identity are not the only reasons for expressing an opinion. In most cases, we express an opinion because we want to convince other people. However, taking into account the importance of convincing could lead to another aberration. Tolerance should not be considered as something temporary, necessary as long as opinions differ. Opinions will most probably always differ, and we will therefore always need tolerance.
Given the importance of convincing, we should not blame people for being intolerant when they criticize or even laugh at another point of view. You can be tolerant and “politically incorrect” at the same time. After all, tolerance is there to make criticism possible. Without tolerance, there is only unity. And unity implies the absence of criticism. You are intolerant only when you suppress opinions or customs, when you persecute, physically attack or discriminate people who have another opinion or custom, or when you use force to change people’s opinions or customs.
Tolerant people therefore do not have to leave things as they are—for the love of peace, because of indifference, lack of power, or whatever. If you want things to be different, go ahead and argue. You should not be accused of intolerance. Tolerance is sterile when it is no more than putting up with each other or avoiding to persecute people with different beliefs. Tolerance should lead to relationships based on the benefits of difference, criticism and public life.