Vatican City, December 14 - Pope Benedict XVI has said people cannot call themselves peace-lovers if they are in favour of abortion and euthanasia. "Anyone who loves peace cannot tolerate attacks and crimes against life," the head of the Catholic Church said in his message for World Day of Peace 2013, which was presented by the Holy See on Friday. "Those who insufficiently value human life and, in consequence, support among other things the liberalization of abortion, perhaps do not realize that in this way they are proposing the pursuit of a false peace "Indeed how could one claim to bring about peace, the integral development of peoples or even the protection of the environment without defending the life of those who are weakest, beginning with the unborn. "Every offence against life, especially at its beginning, inevitably causes irreparable damage to development, peace and the environment. "Neither is it just to introduce surreptitiously into legislation false rights or freedoms which, on the basis of a reductive and relativistic view of human beings and the clever use of ambiguous expressions aimed at promoting a supposed right to abortion and euthanasia, pose a threat to the fundamental right to life". The pope's message for World Day of Peace 2013, which takes place January 1, is entitled Blessed are the Peacemakers.