Okay, but that's excusing one genocide with another genocide.
The difference is that capitalism doesn't require genocide in order to establish itself, even if it sometimes occurs in the pursuit of it. Or are you saying that when people first figured out to, say, use sea shells as a method of accounting and facilitating trade, it involved killing a bunch of people before anyone was convinced that it was preferable to trading goods against each other?
Capitalism (or free trade, rather) can evolve naturally and spontaneously among a group of individuals who seek to maximize everyone's utility. When the currency had collapsed after WW2, people traded with cigarettes instead of money, even if they were non-smokers, because it was practical and convenient, no one forced them to. And yes, there was genocide before that, but it didn't happen in order to get people to start trading in cigarettes.
Again, I'm not saying that capitalism is by definition non-violent, or that violence in pursuit of capitalism is more acceptable than it is in the pursuit of communism. Absolutely not. All I'm saying is that it can be non-violent, whereas communism always seems to make violence a prerequisite in order to get everyone on the same page.
Also, I think it would help any further discussion if we could make a distinction between capitalism and free trade, as the two are often conflated. There certainly is a case to be made about usury being bad, because it helps to increase and accelerate the divide between rich and poor, and always leads to wealth and power being concentrated in the hands of a few. The word "capitalism" kind of implies that it's the capital doing the work, i.e. usury is part and parcel of the system, and then people tend to focus only on the predations of banks and neglect the advantages of free trade over forced association and planned economies as it is common under communism.
But there's a reason the founding father of the US were so vehemently against the creation of a central bank. And it seems that they're proven right by the fact that ever since our government decided to create one anyways, the gap between rich and poor has risen much faster than it used to. So maybe, just maybe, "capitalism" isn't the root of our problems, but state-sponsored usury is, because when the government is in control of the money supply, they can always simply choose to arbitrarily inflate everyone's wealth away, which always tends to hit the poor much harder than the rich, because they don't have easy access to inflation-proof investments.
Right. I believe that idea is called socialism, not communism. Unlike communism, which demands a complete overthrow and reform of the system in order to be established, socialists are generally happy to bring about reform within the system by just passing laws requiring various amounts of wealth redistribution.
I'm certainly not against it as long as it doesn't remove too many incentives for people to be able to improve their standard of living by working harder. Having a reasonable social safety system that ensures nobody has to live on the streets unless they absolutely want to certainly seems desirable. And yes the US could probably improve in that area.