Our species' ability for higher reasoning and empathy sets us apart in the animal kingdom, yet it seems to fail every time the economy does. Xenophobic, bigoted & closed-minded people do not make good leaders, especially if a country is mid-depression and dealing with real immigration issues. Ironically these are the times when people's fear and frustration is at its highest, and it's that fear and frustration which proto-fascist nationalist parties feed upon.
If history (and European history in particular) has taught us anything, it's that political policies based on fear and hate don't end well. Yet more and more people are falling for them. Again. The centre-right political party in Australia ran a campaign which included some fairly racist rhetoric. The majority of Australians voted them into power last year. To say it's gone downhill would be something of an understatement.
There will always be a small percentage of people who's vote is driven by hate. There's not much we can do about that. There is however a much larger percentage of good people who are falling prey to their own fears and frustrations and buying into the fiery "let's fix our country!" nationalist crap they see on billboards and TV.
To those people, I urge you to do your own research into exactly who and what you're voting for. It's one of the most important decisions you'll ever make. A little due diligence from everyone will change the world.