There’s undoubtedly at least a bit of projection there, but I think more what it is is just that tankies are driven almost entirely by righteous indignation, and they’ll take pretty much any chance they get to indulge in it. They don’t really stop and think about things - they just see something that could serve as a basis for a nice, satisfying righteously indignant screed and off they go.

And that leaves them susceptible to, among other things, hypocrisy.