the philosophy of emotivism

"People mistakenly assume that their thinking is done by their head; it is actually done by the heart which first dictates the conclusion, then commands the head to provide the reasoning that will defend it."
~ Anthony de Mello, from Awareness: The Perils and Opportunities of Reality

Would this well known, modern Jesuit priest agree with the Emotivist, or Non-cognitivist, or maybe even ethical subjectivist schools of philosophy?

Emotivism is a school within Non-cognitivism, which is not quite the same as ethical subjectivism. The idea being that one's political views, or opinions on any matter, are not arrived at through logical analysis, but though psychological needs. Logical analysis is employed after the fact to justify the political view.

This process may be completely non-conscious, or barely conscious.

This must be at least true to some degree with everyone, and maybe 100% true for most people. The best debaters have always know about this, making sure that their rhetoric appeals not only to the mind but to the heart as well.