How about you let these organisms have control of several southern states. Let them split off along the old Confederacy boundaries. Do it bloodlessly, by vote.
Let them work it out for themselves. Establish a hard border. Don’t let them in. You don’t need rubbish like this. Do not assist them or associate with them.
Establish a United States of America of which Lincoln would be proud, and damn the rest. They are not worthy of you.