If we don't judge people, how do we decide who deserves our admiration?

I don't see why an accusation of racism would be untestable. If someone characterizes an entire race of people by saying "they steal, they're dishonest" or they "live like a bunch of dogs" that would seem consistent with the dictionary definition of a belief that "racial differences produce an inherent superiority of a particular race."

it's important to point out why very few Black people actually voted for Donald Trump

The African-American vote traditionally skews strongly Democratic. Rather than comparing parties it would be more fair to compare Trump to another Republican candidate who doesn't have racist baggage. Or we could compare how African-Americans voted for Trump in 2016 versus 2020 after seeing him operate for four years.

Other people have expressed disapproval of the Black Lives Matter movement, associating it with "hate."

The baby boomers who drove the success of the civil rights movement want to get behind Black Lives Matter, but the group’s confrontational and divisive tactics make it difficult. In the 1960s, activists confronted white mobs and police with dignity and decorum, sometimes dressing in church clothes and kneeling in prayer during protests to make a clear distinction between who was evil and who was good.

But at protests today, it is difficult to distinguish legitimate activists from the mob actors who burn and loot. The demonstrations are peppered with hate speech, profanity, and guys with sagging pants that show their underwear. Even if the BLM activists aren’t the ones participating in the boorish language and dress, neither are they condemning it.