Because Thiel is making the claim, that not only are they senior management, but they are both actively influencing the company from working with the USG as wel

Because Thiel is making the claim, that not only are they senior management, but they are both actively influencing the company from working with the USG as well as transporting, what maybe now Google's most important IP back to China. This would mean either large swaths of Google senior management are complicit or negligent, and that Google has no, or easily defeated safeguards around that IP. If Google had a track record of playing fast and loose with data, I'd more seriously consider his claim. In fact if it was coming from anyone else I'd consider the claim more seriously. Aside: I'm not downvoting you as you have a fair question - I don't know why you are negative.