70 Copenhagen 1990 (36) The participating States recognize the particular importance of increasing constructive co-operation among themselves on questions relating to national minorities. Such co-operation seeks to promote mutual understanding and confidence, friendly and good-neighbourly relations, international peace, security and justice. Every participating State will promote a climate of mutual respect, understanding, cooperation and solidarity among all persons living on its territory, without distinction as to ethnic or national origin or religion, and will encourage the solution of problems through dialogue based on the principles of the rule of law. (37) None of these commitments may be interpreted as implying any right to engage in any activity or perform any action in contravention of the purposes and principles of the Charter of the United Nations, other obligations under international law or the provisions of the Final Act, including the principle of territorial integrity of States. (38) The participating States, in their efforts to protect and promote the rights of persons belonging to national minorities, will fully respect their undertakings under existing human rights conventions and other relevant international instruments and consider adhering to the relevant conventions, if they have not yet done so, including those providing for a right of complaint by individuals. (39) The participating States will co-operate closely in the competent international organizations to which they belong, including the United Nations and, as appropriate, the Council of Europe, bearing in mind their on-going work with respect to questions relating to national minorities. They will consider convening a meeting of experts for a thorough discussion of the issue of national minorities. (40) The participating States clearly and unequivocally condemn totalitarianism, racial and ethnic hatred, anti-semitism, xenophobia and discrimination against anyone as well as persecution on religious and ideological grounds. In this context, they also recognize the particular problems of Roma (gypsies). They declare their firm intention to intensify the efforts to combat these phenomena in all their forms and therefore will (40.1) - take effective measures, including the adoption, in conformity with their constitutional systems and their international obligations, of such laws as may be necessary, to provide protection against any acts that constitute incitement to violence against persons or groups based on national, racial, ethnic or religious discrimination, hostility or hatred, including anti-semitism; (40.2) - commit themselves to take appropriate and proportionate measures to protect persons or groups who may be subject to threats or acts of discrimination, hostility or violence as a result of their racial, ethnic, cultural, linguistic or religious identity, and to protect their property;