In the comments section, a couple of posters said, paraphrase, If, as you say, the fascists, neo-Nazis, and white supremacists were such a small percentage of the marchers, why didn't the majority of marchers demand that the objectionable element not participate? That's a valid question.
One comment argued that the fascists were paid agents of George Soros. A pretty far-fetched conspiracy theory. Another comment argued that homosexuals and abortionists are out to destroy Poland. Not a helpful point of view.
You can read the article, "Here’s What The Mainstream Media Isn’t Telling You About The Poland Independence Day March," by Dorothy Cummings Mclean here.