There's a certain kind of person who has an assortment of good intentions, doesn't want to back too much violence and oppression in the world because that would make them feel bad about themselves, but also doesn't want to make themselves feel uncomfortable or inconvenienced by progressive social change.
And so, they do just enough to not feel shitty about themselves.
And they don't bother doing much more.
That's the kind of person I see falling under the label "liberal."