It might help to know what you want to have accomplished upon walking away from the liberal(s). For me, I resent being "labeled" as racist. Most of the time, I want to genuinely influence the liberal(s).
I recognize the truism that to be liberal requires little thought and little effort(thank you Rush Limbaugh). When I want to influence a liberal, my goal is to get them to think for a moment. If I can do that, then I feel that I have accomplished a major victory because I know that they will quickly revert to feelings away from critical thinking.
I also like to drive a wedge between liberal politicians and the liberal rank and file. Enough for now.