They know that there's no wage-price spiral, and they know that this inflationary episode is not about excessive demand, which means they know that raising interest rates will not curb inflation. You can even see this in the data they don't talk about: Japan has maintained low interest rates through this whole saga, and its inflation has tracked that of countries that raised them. Because that's how supply-driven inflation works.
This has nothing to do with inflation; it's just an excuse to attack labor activism.