Your sympathy for the victims signals your virtue, but my family lives in Melbourne and passes the Flinders St Station every day, and I know that they would prefer you learn what is liberal democracy and what is the Universal Declaration of Human Rights, so that you can defend them and defeat our enemies.
I am sorry if your family has been directly effected by this and I'm sorry to hear of it in any case, however, vague hatred for islam, complaining about incitement to violence and citations of your favourite reading material will not change that.
You've actually had a rare opportunity to engage with someone from that faith community, if you think that the existence of that faith community itself and their beliefs are part of the problem, in order to converse as to why things like this happen, you've singularly failed to do so.
At best you've maybe vented a little and felt a little better for it, though hating and anger dont help you, dont help your country, dont help anyone who is interested, non-muslim or muslim, in preventing reoccurences of violence, deaths and avoidable suffering.
You could think about that, or, you know, you can carry on doing what you've always done and be as completely and utterly ineffectual as always.