I came on a simple-minded rightwing post, Ten reasons to reject socialism, and decided to respond with a simple-minded socialist list that addresses each point. Some of the points really have nothing to do with capitalism or socialism, but since the other writer thought they were relevant, I'm including them. I'm only doing nine because the other list includes religion twice.
1. Capitalism, fascism, and nazism are the same ideology.
Fascism and nazism are only extreme forms of capitalism. Mussolini said, "Fascism should more appropriately be called Corporatism because it is a merger of state and corporate power." (Don't be confused by "Nazi" meaning "national socialist"—the Nazis were as socialist as the Democratic People's Republic of Korea is democratic. The first thing the Nazis did when they came to power was to put the communists in camps.)
2. Capitalism violates personal freedom.
Capitalism gives the rich more power than the rest of us.
3. Capitalism violates human nature.
Capitalism goes against the human impulse to share.
4. Capitalism violates public property.
Capitalism calls for "redistributing the wealth" by taking from the people to give to the rich in bailouts, privatization, cheap leases on public land, lower tax rates....
5. Capitalism opposes the individual's ability to form consensual relationships.
This is one of the points that's really irrelevant—the Log Cabin Republicans are devout capitalists, but they supported gay marriage and deserve the credit for the repeal of Don't Ask, Don't Tell. However, it's true that socialists tend to think your personal life is your business, and it's very true that many loveless marriages are created or are forced to continue thanks to the economic desperation that capitalists encourage to ensure cheap labor.
6. Capitalism opposes children's rights.
Again, irrelevant. There are capitalists who want to protect children from abuse. But it's true that socialists believe society should be able to keep parents from treating their children as slaves or clones.
7. Capitalism promotes radical inequality.
I won't elaborate because capitalists don't deny this. Sane capitalists, the moderates and liberals, want benevolent inequality rather than the radical sort practiced during the Gilded Age, but their goal is still economic inequality.
8. Capitalism promotes state religions.
Again, irrelevant—you can find theistic and atheistic capitalists and communists. But historically, capitalism has supported religions that rationalize economic hierarchies. There's a reason the first Christians, who shared everything, were persecuted, and Constantinian Christianity, with its emphasis on obedience to rulers, has been pushed by kings and tycoons.
9. Capitalism promotes black-and-white narratives of the world.
The point of capitalism is profit, so anything that helps capitalists profit is presented as good, and anything that hurts profit is bad.
May God protect America from capitalism.