The whole thing about snubbed senators getting mad and wanting revenge is beyond undemocratic it's tyrannical.
Edit: If you downvote, tell me why you disagree.
The Senate cares way way more about Google killing cooperation with the DoD and then cuddling up to China to censor search than anything else. Google's willingness to violate human rights to gain a foothold in a search market should bother more people than it currently does.
Senators are legislators. Legislators write laws, changing things from "illegal" to "legal" or vice versa. The question of whether conduct should be illegal is thus absolutely their business, and the purpose of senate hearings (aside from grandstanding) is to give a public forum of record where these issues can be discussed to guide future legislation.
There seems to be a strange misperception that judges should decide whether something should be legal or not, when their role is to /interpret/ the law as it exists, and /apply/ the law to specific situations.
To reiterate, there's a reason this article is about Google and not Facebook and Twitter...because those two showed up to the Senate hearing...which was bipartisan.