Never heard of that definition, but since you indeed seem to distinguish between right winger and right leaner, then that does make your original comment disingenuous. The reason that is so is because you apply the widest grouping possible for the left but not the same for the right, meaning you're comparing apples and oranges.
This wasn't about parties though. This was about the left, not the Democrats. The Democrats exist in the US, whereas leftism is global. So if your post had been about the Dems being idealists, but Reps being pragmaticists, then the argument would've been a different one. It wasn't, and so here we are.
Besides, how on earth do you reconcile raising taxes to afford welfare being idealistic with the success of the nordic model, one I know for a fact you've praised in the past? Is that another US centric thing where it's only idealistic because of the political situation?