Green Day's Political Views Based On Their Lyrics?

"They seem to have liberal political views, based on their lyrics.
Politics didn't really come in to their music in a big way until American Idiot in 2004, followed by 21st Century Breakdown in 2009.

Green Day, especially Billie Joe Armstrong who writes most of the lyrics, are strongly opposed to the wars in Iraq and Afghanistan.

They did not agree with the Bush administration, and supported Obama for the 2008 election campaign.

The music video for The Saints Are Coming, for which Green Day collaborated with U2 shows scenes of destruction after Hurricane Katrina in New Orleans. Like many other Americans, Green Day believed that the Bush administration could have dealt with the hurricane (and other events, such as 9/11) in a better way.

Billie Joe Armstrong and his wife and two young sons traveled to New Orleans to help rebuild damaged homes.

Holiday is a song that deals with war themes, and has an anti war message ("the shame, the ones who died without a name" refers to fallen soldiers, and there are other lyrics throughout that refer to politics and war)

Bascialy they're liberal and not afraid to broadcast their political views. All you have to do is watch the first fifteen minutes of Bullet In A Bible to see that.
But they're also happy to follow up their beliefs - ie actively supporting/promoting Obama and rebuilding homes in New Orleans."

(http://answers.yahoo.com/question/index?qid=20091207201919AAojgd5)