I have touched here on a problem that is masked if one speaks of racism. And that is the fact that the major differences between the established and outsiders group, which create tension and irritation, is not the form of the face or the skin color but the form of behavior: something learned. The form of behavior and feeling, of sentiment, is different in the immigrant groups from that of the established groups, and that may give rise to an enormous irritation.

The number of those who have to be assimilated to the majority is not too high. It remains small compared with the numbers of the majority. But there is one thing - and that is the main reason for this digression - that French and British have in common: to this day they have an immense pride in being French, in being British. The fact that in the meantime both have come down to earth a little has not yet affected their pride in their own nationality and the fact that, if I may express it that way, they are mutual admiration societies: how fine the British are, how fine the French are.

Debating the concept of race does not mean that I in any way regard this as a quarrel between neighbors over where they come from. I have perhaps said enough when I said the alternative to assimilation is that immigrant groups form their own state or go away for lack of acceptance. Why should it be less serious if quarrels and dissensions are socially related? After all, the quarrels and dissensions between Russia and America are also not racial. And yet they seem to me extremely dangerous.

I think that one not only has to make demands on the established group, but one also has to make demands on the outsider group. One has to make clear: if you want to leave, please do so. But if you want to stay here, a degree of accommodation to the Dutch outlook, Dutch manners, and a degree of identification with the Netherlands will be expected of you. There is no reason why there cannot be Dutch Turks or Dutch Moroccans. But one can expect from them a degree of identification, some change of their own social identity.

The heart of assimilation process of absorbing minorities lies in the self-image of a nation. There are, as you will know, big differences for instance between the self-image of the French and the English. And the Germans, in accordance with their rather chequered history, had at least in the past very little capacity for absorbing minorities.

Of course you can more easily recognise the outsiders because they have a different skin color. But let us take for instance the relationship between the White Anglo-Saxon Protestant majority in America and the negroes. What is important here is that the negroes were the descendants from slaves and were excluded from power, while the white majority kept them at bay, kept them down, kept them where they are. If the negroes in the future became assimilated and acquired equal power access, if there were a black president, then many of these things would change.

The natives of England are closing their doors to relationships with Asians and Africans or, for that matter, Turks and Spaniards. While the Africans and Asians on their part are increasingly closing their doors too and resentment at both sides is increasing. This trend can be dangerous. It can lead, sooner or later, to violence - even in this country, which is traditionally an opponent of violence.