A manifesto posted online shortly before Saturdays massacre at a Walmart in El Paso that the suspected shooter may have written blamed immigrants for hastening the environmental destruction of the United States and proposed genocide as a pathway to ecological sustainability.

Filled with white nationalist diatribes against race-mixing and the Hispanic invasion of Texas, the manifesto highlights far-right extremists budding revival of eco-fascism.

Titled The Inconvenient Truth, an allusion to Al Gores landmark climate change documentary, the ranting four-page document appeared on the extremist forum 8chan shortly before the shooting. Authorities have yet to confirm whether Patrick Crusius, the 21-year-old Dallas-area white man arrested in connection with the shooting that left at least 22 dead, is the author.

The environment is getting worse by the year, the manifesto reads. Most of yall are just too stubborn to change your lifestyle. So the next logical step is to decrease the number of people in America using resources. If we can get rid of enough people, then our way of life can become more sustainable.

HuffPost reviewed the document but, with consideration to the ethical concerns of broadcasting what might be a notoriety-seeking killers messaging, is not publishing a link to it.

The manifesto explicitly cites the 74-page message posted online by the gunman charged with killing 51 worshippers at two mosques in Christchurch, New Zealand, in March. That alleged shooter, Brenton Tarrant, a 28-year-old white Australian, thrice described himself as an eco-fascist motivated to repel waves of migrants fleeing climate change-ravaged regions of the world.

For years now, denial served as the extreme rights de facto position on climate change. That is starting to change.

Just look, as Dissent magazine did in May, at this springs European elections. Following the European Green Partys historic gains, the far-right Alternative for Germanys youth wing in Berlin urged party leaders to abandon the difficult to understand statement that mankind does not influence the climate, an issue that moves more people than we thought.