I think it's unfair to say that "the left" invented some strawman from thin air overnight.

Here's an article from last year detailing dozens of instances where "a few nutters" endorsed this replacement conspiracy theory on one of the largest cable news shows in America: https://www.mediamatters.org/fox-news/tucker-carlson-fully-e...

And that's just from one week.

When mass murderers are quoting Tucker Carlson I don't think you can, in good faith, place the blame on the liberals.