At Agile and Beyond 2016, I presented: "Why Should I Go See Another White Man Talk About Diversity in IT?" I spoke mainly about how women and members of marginalized groups are often made to feel unsafe or unwelcome at IT companies, usually without men realizing the impact of what we are doing.
I've put my slides up (link below). If you are interested in the topic, please take a look. I have included many links to information and resources.
slides - scroll down below my profile to find the .pptx