I'm not asking for people to turn off skepticism or blindly trust researchers. It's not disrespectful to be skeptical.

What is disrespectful is not bothering to read what people have to say before dismissing them as liars who are too vested in "the current research direction" and/or money for their perspectives to matter. It only takes reading a few comments to see that's not happening - for starters, people were skeptical of this group's work for a while now.

Also, “believe science” is the exact opposite of the scientific method.

“Hurl unfounded and baseless accusations of personal corruption” is not the scientific method either.

Trying to pass off conspiracy theorist “disprove the negative” arguments as reasonable discourse is intellectually lazy, at best.

Is that an accusation of bad faith or just a non sequitur?

There is that minor issue that we don't have nearly the same experience and resources as the scientists who say what they say. Are you implying we all becom biologists and figure out the source of Alzheimer's ourselves? As some point you have to trust people and choose someone.