So those who are mis-representing the DUP as holding an "extremist stance" on abortion are utterly wrong on two counts - their mis-representation of the DUP and their attempt to speak of "abortion rights".
It is perfectly reasonable to hold a view that abortion - in the meaning of a directly intended choice to bring to an end the life of a child in the womb - should not be lawful. And it is perfectly reasonable to make use of the political process to support that end. As a candidate for the ProLife Alliance in the 1997 General Election I did precisely that.
Indeed, I would argue that the vilification of those who oppose legalised abortion is a significant breach of their right to their good name - a right promoted by the UN Universal Declaration of Human Rights Article 12:
No one shall be subjected to arbitrary interference with his privacy, family, home or correspondence, nor to attacks upon his honour and reputation. Everyone has the right to the protection of the law against such interference or attacks.