The actual objection, which was perfectly obvious from the comments you were replying to, is with the use of the word "Javascript" alone without any further explanation, as if it was axiomatic that the use of Javascript is bad.
When an article includes such an extreme opinion without explanation, it inevitably puts off anyone who doesn't share it. Moreover, it calls into question the ability of the author to review the technology in a fair way, and the purpose of them reviewing it at all. React Native's entire raison d'etre is to provide a native version of a web development stack. If you are inherently biased against web development technologies, then you're obviously not going to get on with React Native, or any similar technology.
Sure, I'd like to know why he thought Javascript is a negative. I'd also like to know why some think its a positive. But I fail to see how invalidating his entire argument is going to prompt that discussion. Seems to me like those who disagree with him about Javascript just want to shut down the whole discourse - whereas there could, indeed, be very good reasons why Javascript is a negative.
So using a project and disagreeing with it's entire purpose for existing is silly without further explanation of why javascript is bad for this type of thing.
In his argument he says they should be using Objective-C over Swift, which is just wrong. Apple says to use Swift, it's faster and easier to use.
Beyond not liking javascript as a language it's super fast and easy to learn why not make it so more people can start developing apps using that language. It will create better apps that phonegap apps.
