I can’t prove it to you, I just use my skills at googling “A B Abrams” to conclude that this is untrustworthy. I also can’t prove that the moon landing happened or that matter is made of atoms, doesn’t mean they are false.
See my edit. But here’s the thing. We have video of the moon landing and rocks from the actual moon. That’s solid evidence. We have plenty of evidence of the atom existing, because half our tech wouldn’t work if they didn’t exist.
Where is the evidence of a massacre at tiananmen square? Please read the links I gave you.
Edit: please remember, you said that this was an easily disprovable conspiracy theory.