Unfortunately there are many, in "E1" and "E2" as well who are under the spell of one or other of the "single issues" and perforce count themselves as "unable but to support" what is in fact the "ecumenism of hate/exclusion. They, Catholic and otherwise, subscribe to the Ratzinger theory that "...the ordinary Catholic (and Christian) is a simple person. It is the role of the bishop to protect these simple persons from the power of the intellectuals" (read Liberals). 
This may be particularly so for Catholics. As the "Baltimore" answers the "why" with: Because the Church teaches the truth, therefore....