Sen. McCaskill; How about real compassion for immigrants?

Sen. McCaskill now opposes the nomination of Julie Myers to be the head of the USCIS, apparently because she allowed someone to appear in blackface at a charity event, posing as an immigrant. People were offended. While I understand how people were offended, Sen. McCaskill comes off as hypocritical to me to be opposing a competent bureaucrat for this reason, while at the same time voting against the Dream Act and other immigration reform measures. If she really cares about immigrants, how about doing something that really affects their lives in a positive way rather than this?