Like all arguments, I think this could be solved by watching South Park. In particular the racist flag episode where Stan and Kyle don't see a flag of a bunch of white dudes lynching a Black dude as racist because they just see dudes lynching another dude. Everyone ends up happy when the flag is changed to a bunch of different races lynching the man.
White Out 403 doesn't see this as "innocent Black couple shot at by police" but "known drug-dealing affiliate has warrant executed at residence."
White Out 403 did confuse the boyfriend (Walker, innocent shooter) and the ex-boyfriend (Glover, known drug dealer) earlier, but to him he's just seeing what the "law" is seeing; officers conducting warrant got shot at and fired back.
He's placing the blame on Taylor but it's not because of her race. She was involved in a homicide when she lent her rental car to her boyfriend-at-the-time (Glover) and someone ended up shot 8 times and killed, so she knew the risks. She herself expressed concerns to Glover in the leaked transcripts that she worried for him because of his drug-dealing and Walker was afraid it was either Glover or someone associated with him breaking into the house that night. She lived with him to the point that Glover still listed his home address as Taylor's residence. But despite the clear bad-apple (to say the least) in Glover, Taylor kept close ties with him including, according to Glover, holding onto $15,000 of his that night she was killed.
Rightfully or wrongfully, I think it's extremely likely White Out 403 would have the same opinion on this case if Taylor was white.
But then I think he's missing some of the bigger issues. Would a judge sign five warrants in two minutes if this was an affluential or even just whiter neighbourhood? Would they have fought for the no-knock warrant if she was white? Would the police even be investigating her at all if they weren't Black? Would they be executing the warrant at night and in streetwear if Breonna was a white woman? Where are all the pro-gun second-amendment loving NRA nuts who should be making Walker a hero? And of course would the cops have been charged if it was a white couple? We can't really know the answer to these (well except the NRA one, it's cause racists) but they need to be asked - and that's before getting into what systemic racism exists to keep Black people living in these less-affluential neighbourhoods dealing drugs and so on.
Most of the same figures in this raid had another botched raid in 2018 when they stormed a house (breaking into it despite not having a no-knock warrant) because they were investigating a complaint that a house was selling drugs. They saw a Black man and "smelled" weed, so that gave them enough to obtain a warrant.
Only issue was that the complaint was made four months prior and the residents of the house had changed, so they literally broke into a house of some random family because they saw a Black man standing outside. Two of the three shooters were involved in that raid as well.