With normies I make sure to bring up the opioid epidemic and how much trouble pharm companies got in because they were greedy and didn't care if people were healthy or died. Also doctors endorsing cigarettes in earlier decades. Video of lies by fauci and politicians are also decent rhetoric, and tying it to politics as "team sports" rather than a health threat. It really depends on his good faith though. Some people don't care and just want to virtue signal. You have to ridicule them and make them feel like a bad person. The goal is for them to be silent about it around you. If someone just wants to do the right thing is when you can try to get them to meet you halfway. Also think about the overton window and consider each person has their own personal range of what they can accept and what they'll consider extreme. Think about that beforehand with this guy and be delicate or don't use anything that's outside his personal overton window.