I wouldn’t read too much into this.
First of all, there’s little evidence to indicate that the alleged tweet actually was censored, making this a
loaded question. The very nature of a loaded question will leave the one asked stumped for a bit as they try to process it. For instance, if you get asked by a random person on the street, “When are you going to stop cheating on your spouse,” you probably won’t give a split-second reply. Heck, I was once left speechless of if the check for a meal was to come together or separate, because it was asked in a way that heavily implied I was dating the friend I was with, which I wasn’t.
Second, Cruz directed the question at both executives at the same time. This type of “anyone answer” question has a tendency to cause lengthy silence as people try to avoid interrupting someone, hence the joke, “Don’t everyone speak at once.” I seriously doubt a polite person who has had any reasonable amount of human interaction hasn’t had that experience, minus maybe the joke.
Third, the Twitter executive did start giving a response: It’s contextual based on many factors. Cruz just didn’t like it, probably because that disarms him. He can’t accuse them of going against their word if he has an example, but he also can’t accuse them of labelling the phrase itself as hate speech. And while that may seem to be a simply political move on the executive’s part (not that Cruz is any better - see first point), it’s frankly true. If you don’t believe me, just spend some time on this forum. Questions and statements may be taken differently based on the history, or lack thereof, people have with the user.
Fourth, while I can’t speak of how Facebook or Twitter do things from experience, I do know that some of this stuff is generally automated. For instance, one team I was on at Microsoft would first use an algorithm to gauge the general sentiment of a Tweet before having anyone look, as a way of prioritizing which ones to spend time on. Cruz’s question only makes sense under the assumption that these decisions are human ones (again, it is a loaded question), and in many cases, they aren’t. Humans might review it on request, but the scale that these companies work at is way too big for hiring an entire team to review everything.
Overall, just a lot of factors playing into this. Really, the second point alone makes me wonder how anyone could see this as anything more than Cruz doing a terrible job at leading this.