In this specific instance, the left tried this bullshit because they believed they could pull it off, they believed that Kavanaugh would back out or that Trump would pull the nomination.    They never thought that Kavanaugh and Trump would stand their ground, they never thought that the conservatives would fight back, just like with the Hildabeast, they NEVER THOUGHT THEY WOULD LOSE.  They are stupid.     To be fair, the left were used to pushing and shoving the conservatives around and always getting what they wanted, they could always count on the republicans rolling over, and never fighting back.