I'm getting crushed today at work, but two things:
1) He "gets away" with things because there's a literal white supremacist in the White House. People look at things in degrees in that manner. While a whole slew of things in his past would be considered disqualifying but certain people once unearthed, the reason that so many people came out in support of him is...there's a literal white supremacist in the White House. Same reason that he won the primary, in spite of his flaws. Black people overwhelmingly voted for him out of pure pragmatism, knowing that the chances of this country electing anybody more liberal than Biden was...not SMALL, per se, but decreased. And people just wanted to make sure Trump was gone, because THERE'S A...ok, let me stop.
2) I think that if you peel back the onion, a lot of those political stances are color-based. Ultimately most of them are; it's hard to take race out of a lot of political discussions, because changes in rules help/hurt areas of color to much, much different scales. Doesn't mean that these rules are racist, but...let's be real, some of them are.
Like I said, I didn't want to get into Biden much, but yes, degrees matter.
That is a very important thing to remember when we're comparing anything. Most of the time, two things are not equally bad or good, so we have to use these things inside our craniums to come to a better conclusion than "Both sides..."
As for #2, yes, as I previously said, understanding the history of race in America is paramount to understanding politics in America, and not just the politics of the distant past, but the politics of right now.
Our politics and our policies would be drastically different if not for racism being such a big part of our society. Look at the politics of other countries we largely align with historically and culturally that typically do not have racism near the forefront except when a bunch of refugees are seeking asylum. Then look at our country where one of only two major political parties have embarked on a significant strategy with racism at its heart for a little over the past half century (The Southern Strategy). That strategy included the white washing of history such as "The Lost Cause" of the Civil War, is very connected to what we have gone through during these Trumpian times. Hence why I think it's important within this discussion.