It's not about whether Walter White is a good or bad person. It's about that he is a full-realized, prominent lead role for a white character. Gus Fring is great, but really only develops for about a season and a half. In fact, Breaking Bad starts out by having its first two seasons full of one-note, violent Latinos. Which is strange, considering the show is like the white version of the 1983 Scarface.
I think the entry's title using "Glorification" is a poor word choice. Though it does reflect the tendency of anti-heroes to be viewed as role models or heroic figures, just by bent of being the protagonist. Often times this gets confused by audiences who think the bravado, machismo and violence are desirable traits. I'm sure everybody has met someone at some point who thought Tony Montana was a badass.
Ultimately, though, it's about the roles that people-of-color can get. We're no strangers to the whitewashing of roles here, and the high-profile, challenging and well-paid lead criminal roles tend to go to white actors, while most minorities get something that's only described as "Thug in the alley" on the role sheet.
...including depictions of pirates just feels like cheating, somehow.
Hollywood has made a point of making the popular image of pirate be the Anglo, gentleman pirate who is dashing, charming and has motivations for his actions. Which is pretty much an idea invented out of whole cloth. There are very few PoC gentlemen pirates, most are just violent murderers.