The protesters had been chanting that “Black lives matter!” and O’Malley simply responded: “Black lives matter. White lives matter. All lives matter.” There was a time when that would have been viewed as a true and uplifting sentiment to express. It is now viewed as insensitive and audience members booed O’Malley.
O’Malley later made a public apology and said “I meant no disrespect. That was a mistake on my part and I meant no disrespect. I did not mean to be insensitive in any way or communicate that I did not understand the tremendous passion, commitment and feeling and depth of feeling that all of us should be attaching to this issue.”
Ironically, O’Malley’s opponent Hillary Clinton was also called out for saying “all lives matter.” Clinton used the phrase while telling a story from her grandmother: “I asked her, ‘What kept you going?’ Her answer was very simple. Kindness along the way from someone who believed she mattered. All lives matter.”
That produced an outcry with Renita Lamkin, a pastor at the St. John AME Church in St. Charles, stating “With her statement that all lives matter, that blew a lot of support that she may have been able to engender here.” The Clinton campaign rushed out a statement that Clinton used “All Black Lives Matter” the year before.
Source: CNN