I think that's a rather silly, sarcastic comment. Just as people who appear ordinary and workaday can commit acts of extreme cowardice and violence others who appear ordinary and workaday are capable of acts of extreme bravery and sacrifice as has been seen at EVERY single terrorist attack...
I sometimes work for a large music venue. Got our first pop concert there since the Manchester attack coming up soon. I am not looking forward to it. Not least because frankly I don't think the security, both building wise and personnell wise are anyway near up to scratch to prevent let alone...