> How did these organisations make people vote for Donald Trump?
It's not so much that they made people vote for Trump, but that they utterly failed to rise to the occasion, despite screaming how the stakes were so high.
I really think a lot of the so-called opposition saw Trump as a wedge to selfishly drive support towards their little ideological or personal priorities.
I think the way forward is probably to ditch finger-wagging liberal technocracy and go for a more competent, law-abiding populism, which seeks to strike a compromise that can comfortably get super-majority support (i.e. 60%+ rather than 50%+1) and speak effectively to many of the anxieties Trump harnesses. You're not going to get that by giving to special interest activist organizations.