There has always been a strong connection between the current now known as social nationalism and what is now called the “green” movement.
The famous author Henry Williamson [https://en.wikipedia.org/wiki/Henry_Williamson#Politics], who lived in North Devon and wrote the story Tarka the Otter, was a member of the British Union of Fascists, visited Germany during the 1930s and was, by any other name, a National Socialist.
It is well known that Walther Darre [https://en.wikipedia.org/wiki/Richard_Walther_Darr%C3%A9] was “green” and that he represented a definite current within German National Socialism.
The only state, to date, to have banned cruel experiments on animals outright was National Socialist Germany. The anti-vivisection law was the first law or one of the first few laws passed by Hitler’s government. Cartoons showed Goering (another National Socialist and leading conservationist) and animals saluting, with captions such as “Heil Goering!”, “Even the animals vote for the Fuhrer!” and “Vivisection verboten!”
A leading, though at the same time once-obscure thinker, who espoused both National Socialism and animal welfare (etc), was Savitri Devi [https://en.wikipedia.org/wiki/Savitri_Devi], whose work is now again coming to attention. Her ideas and books even have websites devoted to them: https://www.savitridevi.org/last_man_french.html and https://www.savitridevi.org/.
The connection is not surprising. What is now termed social nationalism is organic, built on the natural order and having respect for the creatures of the land, water and air as well as (contrary to Zionist propaganda) the relatively backward racial groups and peoples of our Earth. The hero Leon Degrelle [https://en.wikipedia.org/wiki/L%C3%A9on_Degrelle] put the latter point very well after the Second World War:
It is striking to see that there is very often an overlap, for example on Twitter, between those who are protective of animals and those who are strongly social-nationalist. Brigitte Bardot is a name which comes to mind: https://en.wikipedia.org/wiki/Brigitte_Bardot.
The new society in Europe will be nationalist; it will also be for Europe’s European future (though anti-EU); it will be green and it will be socially-just.
Update, 28 June 2020
Update, 26 May 2021