Is advocating for the Voting Rights Act & Civil Rights Act an endorsement of liberalism?

Just witnessed a dirty exchange on a communist sub where a POC was banned for arguing in favor of the US VRA & CRA. The ban conditions were 'no liberal apologia'.

Too many are mucking up a fight for enfranchisement with extracting concessions to and participating fully in liberalism's capitalist appetites.

As far as possible they should be League members and their election should be pursued by all possible means. Even where there is no prospect of achieving their election the workers must put up their own candidates to preserve their independence, to gauge their own strength and to bring their revolutionary position and party standpoint to public attention.

- Karl Marx and Frederick Engels
Address of the Central Committee to the Communist League
London, March 1850

This naturally plugs into the question of whether voting in the current 'democracy' changes anything or simply subsumes revolutionary change, etc. But it's ironic that the first to lost their participation in any change, with no pushback from certain allies, are people of color.