"...In the only cases in which the masses have escaped from the kind of grinding poverty you’re talking about, the only cases in recorded history, are where they have had capitalism and largely free trade.
If you want to know where the masses are worse off, worst off, it’s exactly in the kinds of societies that depart from that.
So that the record of history is absolutely crystal clear, that there is no alternative way so far discovered of improving the lot of the ordinary people that can hold a candle to the productive activities that are unleashed by the free-enterprise system.”
-Milton friedman , Nobel Prize Winner, Economist.

"Actually socialists advocate for feeding and housing thousands of people."

That would be people like Engels, not Henri de Saint-Simon. Henri advocated jobs, not handouts.

I have a large back Garden.
I want to build small 4 houses and sell them for 50k each. Whose stopping me?

Is it me? No I want the money
Is it the buyers? No they want houses
Is it capitalism? No capitalism is a thing, not an opinion
...So whose stopping me from building these houses?

If you are in the US outside of big city and leftist run states: nothing is stopping you. Not even building codes in a lot of cases.

It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest. We address ourselves, not to their humanity but to their self-love, and never talk to them of our own necessities but of their advantages. Nobody but a beggar chuses to depend chiefly upon the benevolence of his fellow-citizens. Even a beggar does not depend upon it entirely. The charity of well-disposed people, indeed, supplies him with the whole fund of his subsistence.

Adam Smith’s “Wealth of Nations”

They may advocate for feeding people, but the f nobody is producing anything, they won’t be able to feed them. Human nature is to get as much as possible by doing nothing— but if everyone is doing nothing they will have nothing to feed people. Capitalism harnesses the desire to gain native to humanity and says that to gain we must serve others.

They have to counter that with death camps and execution.

Ari claims socialists want to feed people but their policies cause widespread famine every time they are implemented. They may provide housing, but it is by cramming multiple families into one house. To maintain socialism they have to restructure repeatedly, allow greater freedom, and try to get investment from the capitalist countries. Russia had to do that five times.

On k y reason China is still standing is they've been looting the US through cheaply produced goods they've flooded our markets with. If it wasn't for that they'd have collapsed by now.

That is a fallacy. Your assumption is that there is only so much wealth in the world, but wealth is constantly expanding.

As Economist Dr. Walter Williams said, “Before capitalism the way men gained wealth was by plundering and enslaving others. Capitalism made it possible to become wealthy by serving others.”

Wealth is constantly expanding? Isn’t that inflation?

No. That would be wealth shrinking.

How does wealth expand, then?

https://fee.org/shows/video/common-sense-soapbox/monopoly-might-be-zero-sum-but-wealth-isnt