I don't trust known liars appeals to authority. Resistance to vaccine mandates don't threaten the vaccinated it threatens the governments ability to have absolute power over our bodies and right to engage in commerce. They'll either shut up or call you paranoid for not trusting the government. If they go with the latter you can take your pic of the thousands of reasons to not trust the government. Try to tailor those reasons to the the listeners political sensibilities. You won't get anywhere with them from my experience but they at least shut the fuck up and respect you.