Is SVB collapse orchestrated by crypto bros like Balaji?

By "chance", do you mean "actual, plausible chance ... say at least single digit percentage"?

No

If by "chance" you mean "in a hypothetical alternate universe where crypto 'influencers' actually exist, AND people care about them" ...

The answer's still "no"

Numerous mainstream VCs pulled their money. They did this because they knew the bank was struggling, and their own funds were uninsured.

You don't need to postulate an additional extraneous role for "crypto influencers." The spark was general knowledge of those struggles, that the bank itself announced right before the run. The bank had also been badly run for years. This was also known and written about.

I think this theory gives way too much supposed power to crypto influencers. It's like blaming the rain on Bigfoot. There's a line in a book I like. Paraphrasing, but...

"You're not big enough for God to care that much about your sins."

look at the tweets that supposedly started this sentiment train, were they from crypto bros?

Short answer: No.

Long answer: No, they were VCs.

No.

Who?