It doesn't fall on deaf ears at all. If mankind was like that we would still all be racists and Black people would still be slaves.
People make mistakes(you, me, your parents & grandparents are all guilty of this & USA and Europe have also had their fair share of making plenty of mistakes). The only way anybody changes, is through learning, NOT force. Homophobia, Racial hatred etc, are not overcome by killing people - they are overcome by education, patience, learning.
If the Western World can change over a couple of generations from being homophobic racists, to living as equals in peace. Then why can't the members of ISIS change too?
A bombing campaign from the UK will be just another step closer to World War 3, we are killing people that have been brainwashed by a book. Its not their fault - its the education, the book, the learning. Take out the source, not the victims of the source. Ban Islam - then tell the World why you are banning it, open the eyes of people in the World & stop living with ignorance, buried heads in the sand.
Turkey have already shot down Russian aircraft, the whole episode looks like a cauldron waiting to explode.