That's a bull**** cop out. Socialism and communism are two different things. Besides, socialism didn't kill those people, DICTATORS did. Furthermore, being godless does not make you more violent. In fact, it's usually the opposite. Consider the very god-obsessed middle east, where murder, rape, oppression and war are daily occurrences, committed by the faithful. Consider the USA, where religion and the military have formed a long-standing unholy union. Consider too, how American christianity existed relatively conflict free in an environment of slavery, for hundreds of years.
People are capable of being really ****ty to each other and god belief has never stopped that. If anything, it's defined who the acceptable victims are. So, save that ignorant blather for someone who CAN'T read a history book.
Sure, many have died in the defense of political religions. That should be our cue to stop treating politics like something in which blind faith is necessary. I don't think classic socialism is the answer to America's problems but I DO think there are aspects of it that make sense that are rejected on religious grounds by right wing morons. When you blame a political system for what humans do, you step into a dumb trap. The conservatives who reject single payer healthcare because they call it "socialism" DESERVE to die, bankrupted by private healthcare costs. That's poetic justice. The tragedy is how many others they'll take with them.