I was originally going to write about Elizabeth Warren being nothing like Ted Cruz, but as it turns out, many people smarter than I have already done so. This is great! These kinds of rebukes (that the vast majority of democrats are really nothing like republicans) should come swiftly and more often.
I should explain why. In comparing Elizabeth Warren to Ted Cruz, it paints a picture of "Both sides do it" and "democrats are no better than republicans!". At best, this gives advocacy to mealy-mouthed, middle-of-the-road "third way" types. But, more noticeably, it feeds into the idea of "government is the problem".
Which, if it sounds familiar to you, is the stance of the modern republican party.
By pushing this idea that "both sides have their extremes", it creates a false narrative. "Elizabeth Warren wants to vote against the bill which will shut down the government? Why, that's just like Ted Cruz! And I hate Ted Cruz for that reason too! Both parties sure are terrible! Government is the worst!"
Except that there's very clearly nuance here, which has been outlined by the links above. Any sort of basic thinking or just knowledge of subject matter shows how the two could not even be close. However, all too often nuance is lost in an age of soundbytes, headlines, and talking points. The false equivalency created above feeds red meat to the base, and panders to "third way" types who would rather favor confirmation bias over confrontation of the false equivalence.
In other words, more people believe the republican mantra of "the government is the problem" when the false equivalence is presented and unchallenged.