I do have reasons to believe Trump is disingenuous. (And if you don't see those, that's your own confirmation bias at play.) But if Trump consistently refused to say racist things and proactively worked to address racial injustice, I'd absolutely believe those statements!
Instead, you've got a huge number of examples of Trump being racist and a handful of examples of him saying the words when a reporter presses him. But where's Trump's Philadelphia speech? What did he have to say about John Lewis's legacy? Where is his leadership on addressing the pain and poverty of Black families?