“Environment for me, but not for thee.”

In a sense, it’s an older mentality related to taking over territory. The “eco” is tied to “cleansing” the territory for the added reason of having some park or sustainable looking agriculture or animal farming [for the master race]. A lot of the focus is on population and how great it would be if there were only a few (but “superior”) humans around. Not them, of course, it’s the others who “need to go”. This links effortlessly to the Nazis’ Lebensraum idea.