Another two examples touched upon in the comments, and which are very common online:

Whites should go back to Europe because they're not indigenous to America. But, non-white immigrants should be able to stay in America. Like, dude, who cares if they aren't indigenous, it's only bad if we're not indigenous?

Also, we want to return land to the 'indigenous' because it was 'stolen' from them. But, we also want to import countless non-indigenous people without even asking the 'indigenous' if they want it or not so that the 'indigenous' can be even more of a minority in 'their' land. Like, dude, who cares if that makes it even harder for them to get the land back?

Ever noticed how it's so obvious that non-whites/White Leftists couldn't care less about 'indigenous' people except as a cudgel with which to bash Whites and White identity? That they never even bother to ask the very same people they call the 'traditional custodians', 'First Nations', etc. of the land whether they think 'diversity' is a strength? That White Leftists and other 'cosmopolitans' are mysteriously the true owners of the land as soon as immigration policy is brought up? The American Leftists will probably abandon indigenism simply because the 'indigenous' are around as pro-Republican as Whites, and their numbers are decreasing. Their votes are of exceedingly little value, much like the Democratic White vote will be to the Democratic Party of a few decades time.

If they actually wanted to solve this problem, they'd pressure European governments to take back Whites outside of Europe, and non-whites would also need to leave 'indigenous' land. In reality, they make absolutely no moves towards realizing this, and their stance is practically the opposite: non-whites want to remain full stop, and White Leftists seem to think that they're exempt for some bizarre reason and that only 'racists' should be deported. Did they ask the 'natives' if they want to keep Chinese, Indians, blacks and a bunch of White queers, trannies, etc. while deporting the rest of the Whites? Nah, they didn't.

These people can believe practically anything so long as it fits a few key criteria, e.g. disbenefits 'privileged' people (of which the whole White race is considered part, and which the J's are bizarrely considered not), erodes distinctions rather than reinforces them, and a few other things. So long as some bullshit works towards those ends, it doesn't seem to matter how utterly nonsensical it is.