Well I'm of two minds about this.
Linus Torvalds is, by all accounts, a bully. But that's how science goes sometimes; it is unforgiving and will make you feel stupid and inadequate, why blame the messenger? And science is hard! People regularly get in your way with shitty ideas, especially when you've hit upon something great like Linux or cancer gene discoveries.
I kind of dealt with this at work recently. We were asked to disable the right click menu on our website. A business analyst thought that it would solve a session management problem and instead of asking us how to solve the problem, thought that they would prescribe this solution to us. I tried to kill this right out of the gate; "This is a bad idea, it doesn't do what you want, if you want better session handling we don't do it this way, so let's close this story and discuss a better approach". Nope, that wasn't good enough. Cue 2 weeks of meetings explaining what the right click menu does and how it doesn't even come close to solving the real problem. I really just wanted to call this BA an idiot and bully the problem away, it would have saved a significant amount of time and frustration for multiple parties.
So I'm imagining this geneticist in similar situations. "Hey, I heard that vitamin C can splice this gene better than how you're doing it, why don't you try?". Cue angry response that could get construed as bullying.
All that being said, there are mean people who just fumble about destroying everything in their wake. So lacking any information about this person's bullying... who knows.