They're just upset that it'll overshadow the fact that Omar Mateen's dad supports Hillary. Which shouldn't matter at all, since at least in the United States, parents aren't held responsible for the actions of their adult children. Sometimes they aren't even held responsible for the actions they do to their minor children.
The whole tone of Church teaching in regard to woman is, to the last degree, contemptuous and degrading. - Elizabeth Cady Stanton