Congrats this may be the most ridiculous thing I've ever read on this board.
Are you actually kidding me? At a time that Jim Crow ruled and Black Americans were lawfully kept out of jobs and schools, you're going to tell me that Black Americans pre 1950 had a lower unemployment rate than whites?
For starters, the bureau of Labor Statistics only started tracking employment by race in 1954, so any statistics you are grabbing before that are anectdotal at best.
In 1954 unemployment among blacks was twice that of whites, with Pew acknowledging that the pattern likely emerged in the 40s.
In fact War on Poverty and Great Society programs of the 1960 narrowed the gap better than almost at any other time in the last 50 years and the two largest spikes in the gap can be seen in the early 70s (Nixon/Ford) and 1983 (Reagan). As recent as 2011 the gap was a much smaller.
Black unemployment rate is consistently twice that of whites
Nice try though.