Well, sort of: he did live on a commune. He also associated with all kinds of unsavory characters (Leadbelly, Pete Seeger) and often questioned his government. He never wore an American flag.
Guthrie's most famous song is This Land Is Your Land, which is about how America belongs to us all. It started as a parody of God Bless America.
Guthrie's granddaughter Anna says:
Woody felt that this was an amazing place to be. He really felt proud of this land. But it wasn't about what the government was necessarily doing. It wasn't about any of that. It was about the idea of saying, This is my home. And I am going to take pride and I'm going to work it. And I'm going to earn the right to say that this is my land. And therefore, I'm going to love it, and I'm going to see the dirty side of it and the beautiful side of it, and love all of it for what it is. He was very pure, I think, in terms of the idea of what the United States meant to him. It wasn't this nationalistic blind pride.
Big thinkers tend to explore different ideas and make themselves receptive to different beliefs. This leaves a convoluted legacy, and the short version can be deceiving: he was a communist, he didn't love America, he didn't work hard and make an honest living. The truth is much more complicated. He wrote thousands of songs, some celebrating the beauty of America, some questioning it, but he got people thinking. There will always be people who make surface judgments about Guthrie and question his patriotism. Fortunately, people like Bob Dylan, Bruce Springsteen, Ani Difranco and The Indigo Girls dug a little deeper.