Can't. It doesn't work.
Televangelists have them snowed over Israel and God only blessing Jews (lie).
And if they're too stupid to understand exactly what their Bible is saying about Jews being of the devil, then they're too stupid to understand anything about the vaccine.
You just can't.
Let them be stupid.
Love them.
Tell them, but after they reject it, be silent and let them die.
God will sort them out after.
Might sound shitty, but it's the only way.