First, the claim is not exactly well defined. The FBI data gives arrest rates per arrest type, while the Washington Post gives deaths per population, so it's not clear if the numbers presented are meaningful or how the author arrived at that conclusion. Additionally, it's unclear how to normalize events that can be repeated vs not; that is, a single person can be arrested multiple times in a year, while they can presumably only be killed once. And additionally, he didn't discuss the impact of race on the likeliness of being arrested in the first place (more on this below).
Second, the lead of the Washington Post's "Fatal Force" project (source of the twitter data) responded to the post on twitter saying,
Hey. You’re making this argument based on my data. Your conclusions are factually inaccurate
Now, for your question:
These seem to indicate that there is not pervasive racial bias in the US police force. Are these statistics misleading or potentially inaccurate in any way?
While the twitter post linked to the 2018 dataset, the current 2020 version, has this summary at the end
Although half of the people shot and killed by police are white, black Americans are shot at a disproportionate rate. They account for less than 13 percent of the U.S. population, but are killed by police at more than twice the rate of white Americans. Hispanic Americans are also killed by police at a disproportionate rate.
So, in absolute terms, there are more white people killed by police. This is perhaps not surprising since the dataset lists that population as almost four times larger than any other ethnicity. But as pointed out above, "The rate at which black Americans are killed by police is more than twice as high as the rate for white Americans. [em. original]"
For further reading, I would recommend this Washington Post article outlining a number of studies evaluating systemic racism related to the criminal justice system.
Of particular concern to some on the right is the term “systemic racism,” often wrongly interpreted as an accusation that everyone in the system is racist. In fact, systemic racism means almost the opposite. It means that we have systems and institutions that produce racially disparate outcomes, regardless of the intentions of the people who work within them.
There are some dissenting studies listed above, but the majority of studies point out that non-whites are disproportionately represented at each step of the criminal justice system (being pulled over; arrest; jail; bond disparity; prison sentence harshness; probation being revoked; parole).
Are these statistics misleading? Statistics are notoriously difficult to get right, and easily manipulated (lies, damn lies, and statistics). The author's intent seemed to be to challenge whether police killings are racially biased. And there was a study on the list WaPo page that said class (income) was the most important factor when determining police engagement frequency. But with all the other data, and including comments from the original author lead, I'm skeptical that the post on twitter holds merit.