Megadeth frontman: 'Obama staged massacres to pass gun laws' - video
Speaking from the stage during a live show in Singapore on August 7, Mustaine claimed that the US would turn into "Nazi America".
"Back in my country, my president is trying to pass a gun ban, so he's staging all of these murders, like the Fast and Furious thing down at the border in Aurora, Colorado," he said in reference to the shooting at a premiere of The Dark Knight Rises.
"All the people that were killed there and now the beautiful people at the Sikh temple [in Wisconsin]. I was talking to JD our promoter here tonight - what a great guy.
"I was saying I don't know where I'm going to live if America keeps going the way it's going, because it looks like it's turning into Nazi America. And he said move down here to Singapore!"
Lawyers acting for Aurora cinema shooting suspect John Holmes have claimed that he is suffering from mental illness, while a decision is yet to be made about whether the prosecution will seek the death penalty should he be convicted.