If your goal is to accumulate a fan base and fire them up, then of course calling intellectual fouls on the other side is the way to go. However, I claim that if your goal is to contribute to a discussion in which fair-minded people will consider changing their minds, then calling the other side’s intellectual fouls does not get you very far.
I have to say I detest this particular view of politics. I’d like it to be true but it isn’t. At best it might be true of how you maintain and reproduce the status quo.
Politics is basically about violence, the Glorious Revolution might have been mostly bloodless, but it wasn’t successful because the Stuarts were convinced to leave. The Stuarts left because they were forced to.
So, if your hobby is changing people’s minds then you may want to adopt a gentler tone than Paul Krugman and that would be fine, as a hobby. If you care about politics then you have to act to rally people to your side or shift the overton window. Measured reasonableness doesn’t work, its just a recipe for impotence and objectively a position in favour of the status quo.