I think too many people get upset about swearing. It brings a strong emphasis, it’s not disrespect imo. Knowing how Linus is, I’d take that response in stride. I appreciate his direct approach especially to the brazen arrogance of someone too full of themselves to see themselves as wrong. It wouldn’t be a great way to start a conversation, but as an ender it’s terribly effective. He called a fucking idiot a fucking idiot. That shouldn’t be toxic. Not everything that hurts someone’s tender feels is toxic. The intent should be taken into consideration.
DDOS against a little self hosted instance isn’t really a concern I’d have. I’d be more concerned with the scraping of private information, ransomware, password compromises, things of that nature. If you keep your edge devices on the latest security patches and you are cognizant on what you are exposing and how, you’ll be fine.