Even if they're lefty freak shows. Knowing what you know about the shot makes you accountable to God. So if you have hate in your heart for someone getting the shot and it makes you feel warm and fuzzy inside to smile and say Good for you, it could be the last time you see them.
Serious stuff here.
Be a good neighbor, express your concerns about this, about them getting an experimental treatment for a non-existent threat.
Otherwise you'll never hear the end of 'so and so of covid' stories, because they'll think you're on their team and sympathetic to their ignorant fears and lunacy.
Tell them it's all a big misunderstanding.
I'm planning to change my neighbors. Not going to try to save any of them, they don't deserve me.