How do you talk to a conspiracy theorist?

As a long-time skeptic, I guess I shouldn't be asking this question, but here I am...

Recently I had a, well, interesting encounter with a conspiracy theorist. He was alt-right, pro-Russia in Ukraine, and a religious fundamentalist. These characters are quite rare where I live, which is in Sweden (I can't imagine what it is like to live in a society where such people are mainstream). Compared to the US (where I assume most posters here are from), religious belief (especially fundamentalism) is not very common, and there is strong public support for supporting Ukraine until victory, meaning when the last Russian soldier is kicked out of Ukraine.

When it came to the Big Bang theory and the theory of evolution, he denied them and called them crazy. I suggested that he look into what most scientists think of those theories (they accept them) and why. He dismissed that, saying "But who owns and funds their universities?".

Later, when the discussion turned to Russia, he seemed to reject the very notion that the Baltic countries had ever been independent countries. When it was pointed out to him that the USSR invaded and occupied) those countries in 1940 as part of the Molotov-Ribbentrop Pact, he dismissed that by saying "But who wrote that history?".

Basically everything that doesn't fit his narrative is dismissed as being the fabrications of evil, moneyed powers. (Meanwhile he accepts Russia propaganda and disinformation without question.) How do you talk to someone like that? Appeal to conspiracy theories is essentially making your own views unfalsifiable.