How do you protect leftist spaces

Liberals or Neo Liberals are frankly not leftist... Right Center with a topping of social justice virtue singling at best... Some of them are oblivious to this, some are openly dishonest... How do you protect them from taking oven leftist spaces in an effort, both organized and non organized to normalizing the rhetoric as being "leftist" The same way that Progressive groups were invaded by entitles such as Correct the Record back in 2015... How does the community prevent this so actual leftists ideas and ideals can progress in out society. It is my opinion, and one shared by many others, that the purposeful confusion between liberal and leftist holds back progress and keeps it from being taken as a serious political potential.