Like dudithebudi said listen to them and respond. Think of it like improv, they say a subject, (any subject) and you say “yes, and… its capitalism’s fault” (some people might respond better to the ruling class, the billionaires, big corporations, etc) Nearly every problem comes back to capitalism, even the weather.

Once you have established that the problem is capitalism you say “and under communism that problem wont happen.” and as they scoff and say “but communism never works” (or whatever other slander they have against communism) you say “Who told you that? Capitalists. bit of a conflict of interest there hey?” “capitalists have a monopoly on education, media, art, and culture, and they use that control to demonize their only legitimate rival.” Then send them to Yellow Parenti.