We should be able to home about everything and anything. But the more politically incorrect your humor is, the funnier (and more true) it needs to be. His new material just isn't funny.
Your contributors must attribute copyright or agree to any reason license if you choose this. (This seems so obvious to me that I didn't mention it)
But it's still strictly superior to MIT licensing, which has the same requirement (since that's part of copyright law, not party is the license itself), while still preventing commercial adoption under a different license.
Individuals that sell billion dollar paintings to the Pentagon.