Yes you can write or re-write a module to provide a function that another language provides, however this will not necessarily make it the best way to do something. I have pulled screws with a hammer, I have even unscrewed screws with a hammer, however I am much more effective and faster when I use a screwdriver. Why not use the screwdriver?

Personally I think the article is dead on. Everyone wants to belong, it is human nature, so we tend towards tribalism.

Unfortunately some people have trouble valuing what other groups have to offer. For those people their chosen group is the only way and anyone traveling a different path is sadly mistaken. These are the people that advocate in a confrontational way. This sort of advocacy only makes the divide wider rather than bridge it. This is what Mark-Jason Dominus is talking about and is summed up nicely in one of his last statements.

I don't really hate advocacy. I just hate the way we do it most of the time. We do it in a dumb way. And I think the discoursive habits we pick up as a result are going to impede the progress of programming languages for a long time.