Indeed, colorblindness, and the insistence that we are all the same, does not help unify us but only serves to erase our respective histories.
If you oppose having a colorblind government, then what policies do you recommend? Would that create a danger of using racism to fight racism, potentially creating racial resentment from some people who feel they were made to suffer or failed to receive a benefit from the new policies?
What would you take "insistence that we are all the same" to mean?
In your view, should people be raised to have a sense of individual identity or collective identity? Do you believe that race determines a person's thought processes and their beliefs?
You can have a color blind government while acknowledging and condemning past and present racism and working to combat that; the two aren't mutually exclusive.