I watched it again and here's what I think...
Donald Duck had a job, but got angry because he was working for a man who made more than him. While listening to news reports about how the rich get richer and the poor get poorer, DD gets himself fired because of his intense hatred for the rich guy he works for.
He tries to find work, but cannot. He gets a notice that his rent is 6 months overdue. His house goes into foreclosure (naturally the sheriff is portrayed as a big, mean, old man who doesn't care). He suddenly hears Glenn Beck on the radio asking "How many Marxists do you have around you on a daily basis?" DD looks outside and counts all of his buddies as Marxists. (However, that wasn't the point Glenn was making. DD is just too stupid to figure it out. He only hears that he wants to hear.)
DD goes completely bat crazy thinking there are Nazis coming to get him and that he's going to be killed (again, not understanding what Glenn is saying). DD hears everything that's wrong with the country from Glenn (ACORN, illegal immigration, Rev. Wright, etc.), but instead of standing up like a man .... erm .... duck .... and doing something about it, he boards up his door and hides from the world.
Suddenly he hears Glenn talk about the Insider Extreme and DD can't wait to find the money to sign up. When he does, Glenn calls him a lazy moron who needs to get a frickin' job. DD gets mad at Glenn and shoots the radio creating a ginormous hole in his house.
The End.
Donald Duck has a liberal mindset - always mad at people who make more than him or angry when someone criticizes him. So he stupidly got himself fired in an economy where jobs are hard to come by. If he would've just done his job correctly, his house wouldn't have been foreclosed on. So he suddenly hears Glenn's words and changes to being not only stupid, but paranoid since he only hears snippets of what Glenn says and not the whole picture. When he realizes that Glenn thinks he's a total lazy-ass moron, he gets mad AGAIN and blows a hole in his house.
Conclusion: Donald Duck is an idiot who could've had a paying job and a hole-less house if he'd have just kept his anger for rich people in check and realized it's the rich people that provide the jobs.