He just said that there are goals to be worked on together, not that they all have a full and exact overlap. And fortuitously there are certainly some interests that can be worked on together including catastrophe prevention. If there are people working to create ecological catastrophes, then if the movement grows to a sufficient size, people will become obligated to disavow that support, sever institutional ties and suppress those elements of the movement (as with extremism in all social movements), and although it’s not going to take a trivial effort to split, it’s only going to be more painful to do it later.
He just said that there are goals to be worked on together, not that they all have a full and exact overlap. And fortuitously there are certainly some interests that can be worked on together including catastrophe prevention. If there are people working to create ecological catastrophes, then if the movement grows to a sufficient size, people will become obligated to disavow that support, sever institutional ties and suppress those elements of the movement (as with extremism in all social movements), and although it’s not going to take a trivial effort to split, it’s only going to be more painful to do it later.