Better Suggestions
A lot of well intentioned but confused folks think that political change happens through rational discourse and persuasion. You talk to the Nazis, convince them that hating Jews is wrong, and then you join with them to vote for single payer healthcare, or whatever. Good ideas flourish, bad ideas die, so let everybody talk together in a circle and eventually the good ideas will win out and happiness will prevail. People who believe this get very angry if you protest against Charles Murray or dump your NYT subscription because they've hired climate deniers, because they see protest as inimical to the gentle teleological flow of reasoned discourse which will save us all. You have to listen to everyone, then they will listen to you, then enlightenment will flourish. That's the way you do it.

It's a nice dream. Freddie deBoer offers a version  of it in a recent blog post:

"All of this left-on-left critique I do, all of it, is for the purpose of  contributing to the left that actually has the ability to take power.  That’s the only reason. This is all why I find the persistent praise of  my work from conservatives funny. I am doing all this in an effort to  crush you and your movement. And I recognize that the only way to do  that is to motivate the great sleeping mass of apolitical America. And  you know what hurts our efforts to do that? The widespread perception  that the left is full of snide and arrogant people who disdain  persuading others and who are so intolerant and out of touch that they  can’t sit down with someone outside of their movement and say “this is  why you should join us.” Fair or unfair, true or not, that is a popular  perception among precisely the kinds of people who might be willing to  come over to our cause, and if you care about organizing for change, you  have to fight it."

The left is viewed as intolerant; therefore the left needs to be super tolerant in order to convince the sleeping mass of America that they should join the left. And the way to convince the great sleeping mass of America is by criticizing the left for being intolerant, so that the media is filled with stories of the left being intolerant, which will of course convince people that the left is tolerant. Gee, I wonder why conservatives find deBoer's attacks on the left so congenial? It's a mystery. Laugh's on them I guess.

Anyway, deBoer says that there is no other way to get the votes other than convincing people that they should work with you and that you're tolerant. There are no "better suggestions" he says.  The only way forward is talking to people who disagree with you and trumpeting about how intolerant the left is.

Well, let's try to see if we can come up with better ideas. They're not in any particular order.

1. Voting rights. — In a democracy, it doesn't matter how many voters you convince if they're not allowed to go to the polls. Expanding the franchise (felon enfranchisement, enfranchising territories and DC, lowering the voting age, getting rid of voter ID) would have a huge effect on who could vote and who would win elections. The left and the Democratic party have treated this as only a secondary issue, focusing instead on campaign finance reform—a much less important issue, imo. Moving voting rights up on the democrat's agenda could have a huge effect on left success. 

2. Working with your side.—Convincing people who hate you is mostly impossible. Working to change priorities of people who generally agree with you is much more successful.  Similarly, contributing time, money, and other help to organizations and activists who are already working can create change. It's often a slow, difficult process—ACA took decades, and is far from perfect. But ACA was *not passed* by convincing Republicans. It was passed by solidifying Democratic support.

3. Winning. —DeBoer very publicly said he wouldn't vote for Sanders or Clinton. He should vote for whoever he likes, but the fact remains that when lefter candidates win, left policy benefits. This is the case even when the lefter candidate is not that far left.

Trump lost the popular vote, and is unpopular within his own party. Yet his ascendance has opened the way for open racism and xenophobia in public life in ways that we haven't seen in years. Winning makes your ideology seem good; winning validates your programs; winning makes partisans rally round. Hillary Clinton winning would have done more for the left than a billion hours spent chatting with centrists or right wingers in an effort to persuade them. That's the case even though Clinton is not perfect at all, and would have enacted many policies I personally don't like.

4. Intimidating your enemies. Letting people know that they will lose their jobs if they are Nazis tends to isolate Nazis and keep them out of public life. Showing up in force at a townhall and yelling down your stupid rep who voted to gut healthcare is a good way to make reps worried about voting to gut healthcare. Forcing a racist editor to step down at a national publication tends to marginalize racists. Politics isn't always a nice place; the founding fathers didn't intend it to be. Demonstrating your tolerance all the time may in fact make your enemies think you're weak. Signalling that certain stances are not acceptable, and will be met with shunning and electoral consequences is a lot more effective than attacking your own side in the hopes that a public which is barely paying attention will congratulate you for your honesty and then vote for the people you've been kicking.

None of this is especially revelatory, I don't think. Activists and folks who work for change are well aware that organizing involves rallying friends more than persuading foes. But writers like me can easily be dazzled by the glamour of their own typing fingers, and think that words will transform the evil-doers once and for all. That's not generally the way it works, though.