They will not revoke anything. They will just not grant citizenship for immigrants who have committed crimes that go against the (rough translation) “free and democratic foundations of the nation”. Basically: if you are against German democratic and humanitarian values to a degree that is criminal In Germany (eg Hate crimes, attempts to overthrow an election, etc), you can’t become a German citizen. You can live in Germany, you can be allowed to work here in Germany, but you ain’t one of us ans you can’t apply for most benefits.

Besides, the law actually makes it easier for immigrants to get German citizenship.