Of course. And it's an just just as unjust if it only excludes one. And yet, it's a smaller injustice if it's only 0.8% than if it's 11%. As unjust, but a smaller injustice.
It's a greater injustice that a minority had even the meager crumbs offered by the system stolen by white people kicking them while they're down.
You're focusing only on the raw numbers of people rather than the the effect on everybody of that community. You can bet if 10% of white people had the same discrimination visited upon them that police, lawyers, and legislation would be involved tout suite.
Read up on mortgage redlining during the most prosperous period of the 20th century keeping people out of the progress enjoyed by the majority. Injustice is not zero sum, don't use arguments from proportion when there is a fraught history and politics that makes continuing the discrimination much, much worse than if it was one white person against another white person.