I don't have any issue with someone wanting to reassert the liberal basis for Leftist philosophies, but I think that this is one of those things that only makes sense to do in Leftist spaces.

There are too many misperceptions and bastardized meanings that have layered onto Liberalism as a concept in the minds of most people living under capitalism, such that before you can begin reasserting the Leftist agreement with actual liberalism, you are going to have to completely undo the years of capitalist propaganda that has reworked liberalism into being the same as (modern) Libertarianism or Neo liberalism, both of which the average person just calls Liberalism.

And that's not even getting into the de-Capitalism-ization of Libertarianism, which was originally a leftist, anti-capitalist and anti-government movement, but was completely corrupted/co-opted by the Right in US politics in the 50s, into the current AnCap shitshow.

tl;Dr the amount of work and influence that would be required to correct the definitions around liberalism in the minds of the genpop, as a prerequisite for reclaiming the term for Leftists, is beyond our capabilities, outside of Leftist spaces.