WATCH: Glenn Greenwald and Tucker Carlson talk escalating tensions with Russia

"Tensions between the United States and Russia appear to be heading towards some kind of conflict", Carlson began, adding that "the White House has called Russia a national emergency; the relationship between the U.S. and Russia is clearly at its low point ... since the Cold War."

Carlson's guest, political commentator Glenn Greenwald, had a lot to say on the subject. "During RussiaGate, and the whole hysteria that surrounded it", he said. "There was this propaganda campaign to convince a huge part of the population, namely liberals and Democrats, that Russia posed this existential threat to the United States, and they believe it to the point where they think that everything we can do against Russia, we oughta do."

He argued that "if [people] even stand up and question it," others will probably start to think "[they're] some kind of spy for the Kremlin."

Greenwald went on to explain why Russia has become an issue in American politics. "The war on terror is winding down," he said. "We're not in Iraq any more, we're coming out of Afghanistan, so the question is, how do you keep weapons manufacturers, who exert a huge amounts of influence and power in Washington, with the business where the government keeps using taxpayer money to buy weapons that don't do any good for anyone?" He cited the fact that the man Biden chose to run the Pentagon was Lloyd Austin, who "literally came right from the Board of Directors of Raytheon!"

"If you scare enough people to believe that Russia poses a threat to their way of life", Greenwald continued, "they'll agree to keep giving more and more money to the military budget in the name of deterring or stopping them".

Carlson then asked, "Since Russia is a nuclear armed power and part of a very powerful axis internationally, why isn't there more discussion about the degradation of our relations with Russia?"

Before 2017, Greenwald explained, "there was a huge bi-partisan pressure campaign on President Obama to send lethal arms to Ukraine. Obama's point was correct, ... 'it has no crucial importance to us, so why would we want to risk confrontation with a nuclear armed power over Ukraine?'"

Greenwald went on to argue that if one points out "it's not worth U.S. lives, U.S. treasure or any kind of US interest to protect Ukraine from Moscow", they will be "accused of being an apologist for the Kremlin", adding that this has "become a very powerful political weapon." These messages come after recent reports that Russia has begun sending troops to Ukraine, a move which has put all western nations on edge.