Of course, since crack is not actually more addictive than powder, the purported reason for heavier sentences is based on an error.
Interestingly, this appears to be something you have made up out of whole cloth (unless you are feeling defensive for some reason). The phrase “institutional racism” has been employed for nearly forty years to indicate a situation in which underlying assumptions are allowed to exist without serious analysis that result in negative actions or processes affecti9ng one or another perceived race. It explicitly is employed where the (unconsidered) assumptions occur in a situation where no one is actively attempting to behave in a racist manner, but the assumptions permeate the institution, (be it law enforcement, education, some other institution, or society at large).
At no point in this discussion has anyone made a claim that any other person should feel guilty about any actions. I am not sure why you have created this straw man (aside from playing the victim card by pretending that you, as a white person, might be accused of something or another that does not actually appear in this thread).
It is my position that any number of people have made erroneous decisions based on misunderstood information that has resulted in inflicting harm on a particular subset of society. I would like to see the errors corrected, but I have made no claim that there is any “white” conspiracy (or even that “whites” are the sole perpetrators of the problem). I note that one aspect of the situation that makes it difficult to resolve is grounded in institutional racism–a very real situation in our society for whch I have provided a separate example to demonstrate my point.