If someone is trying to convince you that vaccines are bad and their only argument is “read this book and you’ll see what I’m talking about” are you going to read the book? No.
Other anti-vaxxers replying with “I don’t know why you’re getting downvoted, that’s what the book says!” Does not contribute to the argument.
You want to convince people something is true you need to present them with an argument, not a book report. If they already think you’re an idiot they’re not going to read your idiot book. When they present counter arguments that is your opportunity to present any nuance you have.
To put another way: it’s not my job to make your argument for you by studying a topic I don’t agree with.