I wouldn't be too quick on that. What Trump is doing to the GOP establishment, he's also doing to the Democratic establishment. A vote for Hillary is a vote for the status quo, the same ol' same ol' crap. A vote for Trump is a vote to blow up a gridlocked, dysfunctional system of government. That sentiment has a lot of Democrats, record numbers of them, changing their party affiliation to Independent or jumping to Republican. If Donald Trump wins the nomination we may see the entire party system overturned, in a way we’ve only seen five times in our nation’s history (as we move from the Fifth Party System into the Sixth Party System that began in 1968 when the Republicans took control of the South and rural areas and the Democrats took control of the large urban areas and the Northeast, both of which had previously been the domains of the other party).
Until recently (the Internet) Democrats have been socialist, but always in a nationalistic way. The New Deal type Democrats, New Society type Democrats, cradle-to-grave type stuff. Food programs for the young, unemployment insurance and unions for adults, and Social Security for the retired. But now, thanks to the Internet and it's outlet for widespread activism, the Democrats want to pick winners and losers. They’re losing groups that used to be their staunch allies, like poor whites, police unions, and coal miners.
You’ve got all these (mostly) white Democrats who see everyone else in the Democratic Family getting the spiffy set-asides and special interest perks, but now instead of getting theirs, they’re being told they need to check their privilege, apologize, and shut up. These are the people disgusted by what the Democratic Party has become, these are the new Trump Democrats who don't want Hillary and the same ol' crap. These people have had enough. They’re being squeezed out of the Democrat party as it realigns under pressure from Internet activists and they’re flocking to Trump in a serious way. They’re making this move because, to them, Trump’s Make America Great Again is the logical successor to the New Deal and the Great Society.
Hillary says, "Yeah, I understand. I hear you. We should have more jobs and better paying jobs, by gum and by golly." Trump says, "We WILL have more jobs and better paying jobs, dammit." That's the difference.