Calling people monkeys is rather abusive, and this is specifically forbidden by the HN guidelines. Ask yourself: Is your comment just as relevant if you omit that one word? If so, consider editing it out.
Abusive and insulting speech is all about tone -- the intent of the speaker.
In this case, I don't see anything insulting about the phrase 'JS monkey'. It's similar to the idiom 'code monkey', and I'd certainly use the term to refer to myself in casual conversation. E.g., 'Today I'm a Javascript monkey.'
We'd be in total agreement if the term was obviously insulting, but I don't see any evidence of that. Moreover, the original comment would be less interesting without the, um, moniker.
I disagree. "Code monkeys" is a common term used for programmers, and it is not at all derogatory. (If anything, I think it implies a certain level of respect.) "JS monkeys" is simply a derivative form of code monkeys.
Nobody ever called me a monkey to my face, and I have several JS projects up on Github. I have trouble believing thismismamterm of endearment or respect, especially as it was used here.