If you're disturbed by this, good. You should be. This is the symbol that is painted upon the houses of Christians in Iraq and Syria, it is the letter "N" in Arabic, which stands for "Nazarene." The people of the Islamic State are killing, kidnapping and torturing Christians in their countries, and what is the media saying about it? Next to nothing. I am sickened by this, and I'm sick of people ignoring the real problems, so I painted this in protest and as a sign of solidarity.
I'm hoping to raise awareness of this, so that we can all do something about it. You can write to your local and national politicians, you can sign petitions, you can give money and support to organisations working there to help those who are being attacked, and you can tell others about it and encourage them to do the same. Just please, do something, let's stop being silent. Stand with them.