Well, I asked the author for the data that led him to believe that the Julia community is "monopolistic", and he got mad and blocked me instead of linking to anything...

https://twitter.com/ChrisRackauckas/status/98552939470474035...

So your remark is pretty spot on.

You asked for that block in the second question. You sound very entitled to answers.

I am just curious what led him to his conclusions. He made a very nasty comment about a group of people and gives no justification for why. I cannot seem to find out why when Googling either. Is it not okay to ask someone how they came to their conclusions?

You could've asked politely, but it looks you missed your chance.

Because "What is the best X" is a vague question and rarely has just one true answer.

As is true of most interesting questions in most fields.

Possibly, but this is why one shouldn't expect to get a simple, "true" answer or be suprised when there are arguments and flamewars.