Quoted By:
1. The Aurora shootings happened at a Batman film and the assumption was that it would happen at another
2. Joker had become a (mostly mocking) symbol of disenfranchised men in society. The trailers clearly painted the picture as being about being a disenfranchised man.
3. The film implied that the so called privileged straight while man could face severe hardship and injustice which didn't mesh well with the dominating narrative
4. The film implied that it's other people and not just mental illness or access to guns that lead to mass shootings. A mirror was held in front of these critics faces and deep down they realized that they're the sort of people who would have contributed to him becoming the Joker, and rather than try to change for the better, they decided to attack the film itself