I don't know much about Wilders but from what I have heard, he's not the Dutch Trump. He's unlike Marine Le Pen who is modelling her positions on Trump's. I am sure Putin loves her.
From what I gather, Wilders is actually a liberal. I doubt he will get Putin's support.
I believe he wants to bar Moslem immigrants because of Islam's fundamental hostility to Western social models: gay and women's rights, for instance. Fundamentally, that's a secular criticism.
Being anti-EU is not an extreme position. The EU is a political architecture with a federal purpose which anyone with a patriotic bent may reasonably oppose and wish to avoid.
Calling anyone far right is a fast way to marginalise sensible conversation. I don't know all that much about Wilders so he may have done some bad things along the way. But what the NY Times is doing demonstrates its own prejudice, at least on its face.
I will admit that he does look like the product of a Nazi cloning experiment.