I don't think that just because someone doesn't like Javascript it makes their opinion less valid, or that they are a poor developer .. by many professional, highly-productive developers standards, Javascript is a mess and ought to be avoided. For some, the use of Javascript to solve the cross-platform web development problems is a poor decision .. whereas your argument seems to be "everyone else is doing it therefore it must be good and anyone who disagrees with the collective mind is clearly stupid".

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.