> Now if you turn around and use the author for patent infringement for something else, you lose the patent grant that came with the software, and you are back to a normal plain old BSD license.

I see no reason to assume that it reverts "back to a normal plain old BSD license" in such a case.

The article linked by Stallman's response that this is a nonfree license doesn't make that assumption, either:

https://lists.gnu.org/archive/html/directory-discuss/2017-01...