This really isn’t about “liberals”, it’s about the individual liberals and their characteristics. For example Black liberals don’t really use the human nature argument because Black people used to be property very recently with the excuse of human nature. You will most likely exclusively argue this with White men who will not listen to you because they will easily denote you to an emotional natural slave or an emotional foid…
If you try to point to examples of high trust societies they will say it’s because those countries lack immigrants/are homogeneous. If you think you caught them by pointing out that the USSR was high trust and so is China, they will tell you that they admire those countries for being racially homogeneous, anti-feminist (Erroneous belief).
I am exhausted just from thinking about this argument but best of luck to you comrade and I hope the comments have some insights