You shouldn't question vaccines because:
"I'm your doctor. I have the MD and you don't."
"The Science has spoken. Since you don't understand science well and I do, you'll just have to take my word for it."
"The Science has spoken. So you're not allowed to question ANY of it--not the methodology, not the researchers' affiliations, not the gray areas, NOTHING. Media must censor all questioning because questioning is "false equivalence." There's only one side because I'm right and you're wrong."
"You don't want polio to come back, do you?"
"If you question them, I'll make you sign this intimidating form."
"You don't want an immunocompromised child to die, do you?" (Example of moral intimidation)
Read the link first. Then tell me, can you think of other examples of this tactic?
Sadly, there's little intellect left in the debate. Just intimidation.