Personally I think it’s time for an attitude change. Start by destroying the MLK statue in DC - you damage one of ours, we destroy one of yours. You hurt one of us, we kill one of you.
Go after their historical heroes:
Margaret Sanger (racist, eugenics-espousing Planned Parenthood founder)
Franklin D. Roosevelt (Japanese internment)
Harvey Milk (what did he even do?)
If the Left wants to hold people such as Christopher Columbus, Robert E. Lee, Andrew Jackson and Thomas Jefferson to today's standards, then it's time to hold their icons to 2017 standards.