[153791098c]

He has nothing against javascript. He is against non-free javascript which is just non-free software running in your browser. Using Openstreetmap is fine because you don't have to run non-free software on your computer.

Almost all proprietary javascript is obfuscated and tracks everything you do, will identify you and can compromise your system. It's no different than any other non-free software maybe with some better (but nowhere near perfect) isolation from your system provided by the browser you are using.

There are also pretty good free mobile map apps that are on f-droid.