MÖTLEY CRÜE/SIXX: A.M. bassist Nikki Sixx has slammed MEGADETH mainman Dave Mustaine for implying during a concert that Barack Obama was somehow responsible for recent mass shootings in Colorado and Wisconsin.While performing with MEGADETH on August 7 in Singapore, Mustaine told the crowd, "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 and Aurora, Colorado, all the people that were killed there. And now the beautiful people at the Sikh temple." He continued: "I don't know where I'm gonna live if America keeps going the way it's going because it looks like it's turning into Nazi America." Earlier today, Sixx took to his Facebook page to post a link to a Los Angeles Times article about Mustaine's rant and to include the following comment: "Dave Mustaine is a fucking asshole. I can't even imagine how deep this cuts the victims' families of these shootings. He owes every family an apology as well as our great country." He then addressed Mustaine directly, writing, "Hey, Dave, if you think America is turning into 'Nazi America,' as you are quoted saying... Then move the fuck out…"