"Cost in terms of focus rather than financial terms."
Again, you are saying we can't address racism until what you deem to be more important is addressed it is utter nonsense.
"Is it as prevalent now as it always was?"
Or put it another way has it had a massive resurge in the last 5 years, it categorically and provably has.
"Divide and conquer. Tell people they are different, make them suspicious of each other, pit them against one another. Then act with impunity. Divisions caused by race pale when compared against the divisions in opportunity afforded to different socio economic groups."
I absolutely agree with this, which is why we need to crush racism, and get poorer people to work together not against each other. 10 years ago it was pitting hard working poor people against perceived state scrounger poor people. In the 80s it was pitting highly unionised minors and teachers against non unionised people, today it's pitting non-whites, and non-british born against everyone else. These are tools of the elite to divide and conquer, pushing the battle against racism down the priority list is giving in to this, because the elite are highly skilled at using social media to cause division.