Genuinely not understanding something is fine. Already claiming someone was intellectually dishonest because you misread or misunderstood not so much.
The ads business of Facebook is based on the very specific data Facebook can provide their advertisers for very specific target audiences based on private information they gathered through their platform. Like ads for people who die their hair, have an affliction for cheese burgers, are right wing and live in zip code 20500. That is privacy sensitive information (although I picked a public person for this example). They do not provide customers with Trump's private number. That would be private data. They do not just sell ads on their platform, they sell specific target audiences on their platform.
Again, no it isn’t. Facebook at no point provides data to its advertisers.
Yes, advertisers can say “show this ad to people who are right-wing and live in DC” (although I doubt “dyed hair” is a category). However, the advertisers are never provided with any data about who is in that category. That data never leaves Facebook.