And yet, there is little to no disparity when these same minority kids go to poorly funded Catholic schools.
Strange, isn't it? Must be, the teachers are actually teaching the fundamentals instead of 'feelgoodism', and the parents are actually riding herd on the kids so that they behave and learn.
There is no disparity because the schools are selective about admission and dismissal policies. They don't have to accept every single individual that comes in the door. Students that select a private school over public school tend to be more motivated. Parents who pay for private school are more motivated to ensure the kids succeed. The students are not representative of the general population.
San Diego has many private schools both secular and parochial. The private school results are typically much better than the public schools.