If the Tories get a majority in December, I hope the left in this country does go all out for power.
"They go low, we stay high" is potentially the most disastrous political idea of the decade. Sticking to fact-based, policy-driven politics has essentially amounted to the left bending over and spreading its cheeks, whilst rabid free-market psychopaths storm to power.
The right-wing would never have apologised like Labour did for the anti-Semitism thing. Because politically, that would have been the smart thing. Once you apologise, you will be commanded to apologise relentlessly, to grovel more and more deeply, and you'll never escape it.
The Tories never bent or broke ranks on Johnson's racism, or the constant evidence of racism throughout their party, and it worked perfectly for them. They weathered the storm, and now it's no longer front-page news. Anti-semitism still is.