These cuts will hurt a huge number of people, including (probably) those who voted for the parties in the current coalition. To make campaigns like we see on this thread, we need to draw in as many of those adversely affected as possible, given that we have the most powerful means of appeal possible - a direct call to their wallets.
And that includes all those who aren't naturally in the same camp as the people in this thread, all those who think TUers are wreckers, and definitely all those who would be horrified by the site of a rioting mob at the Tories' conference. In this struggle, they, too, are our natural allies.