>>82298620 (OP)
any "country but for [insert] group" requires the immigrating people to have money and skills. It's why Israel worked, but Liberia didn't. Jews were shop owners, bankers, and businessmen all over the globe. When they showed in Palestine they simply bought off the local to get land rights, then paid other jews to build roads and modern irrigation.
But blaks being returned to Liberia were just slaves. I guess some of them built houses in the south but they were most told where to put planks and what to nail together. There weren't really any nation building minded people among them, unlike the jews.
Where would incels colonize? How do you convince the incel engineers to leave their cushy job to build it? Without the pressure of pogroms I imagine it would be very hard.