King never called for reparations. He called for Basic Income for all. The "campaign" he referred to when talking about coming for our check was the Poor People's Campaign, which was for people of all races.

More: https://medium.com/a-universalist-in-an-identitarian-age/martin-luther-king-never-supported-reparations-his-check-referred-to-job-programs-and-universal-a8be1c440e04