The Democrats established the Rulle of 22 for the Filibuster. If it was for racism, then the Democrats did it.
“Adoption of Rule 22 occurred because Wilson and the Democrats framed the rule as a matter of national security. They fused procedure with policy, and used the bully pulpit to shame senators into reform.
Second, why did senators select a supermajority rule? A bipartisan committee was formed to negotiate the form of the rule. Five of the six Democrats supported a simple majority rule; one Republican supported a supermajority rule, and one Republican preferred no rule. Negotiators cut a deal: Cloture would require two-thirds of senators voting. Opponents promised not to block or weaken the proposal; supporters promised to drop their own proposal for simple majority cloture—a proposal supported by at least 40 senators. The cloture rule was then adopted, 76-3.”
Could you still have cloture without a filibuster?