Where the did you get "sit around and cross our arms" from that statement?
That post is advocating "no we need to do exactly what they did and fucking lie and cheat".
That's a fucking terrible idea. The left base does not respond to the same appeals as the right. Lying and cheating more would just depress turnout and support from the significant portion of democratic voters who operate in the realm of reality and aren't nearly as tribalistic as the right. And it would do nothing but further disillusion the half of Americans who don't even bother to vote.
And that's aside from the fact that the media would revel in calling out every single lie the left makes, unlike the right, because leftists wouldn't throw as much of a hissy fit over valid criticism and hurt their ratings like the right does. Plus right wingers actually make up more of their viewers anyway. This means swing voters and independents are further pushed away too. The reason those tactics work on the right are because of the institutional and media advantages they have, in addition to their base being overwhelmingly ignorant, tribalistic luddites.
We don't even need to lie, the facts and evidence are on our side. What we abso-fucking-lutely need to do is be more aggressive; willing to identify the enemies (the republican politicians, white supremacists, and the 0.1%), relentless in attacking them with truth from all angles, and articulate in explaining how they all work in concert towards the degradation of this country, the world, and all who inhabit it. No more of this falling over ourselves to appease them, work with them, treat then like friendly colleagues, helping them manage the politics of their crazy base, and praising them whenever one of them shows the slightest semblance of human decency. And it needs to be a constant, unrelenting political and rhetorical assault on those enemies filling the public airwaves all the time. We can't just go media silent when it's time to govern. I think Obama neglecting the bully-pulpit had huge negative consequences, and is a mistake the Trump administration is unlikely to repeat.