We fought this for almost fifty years and finally defeated it overseas. Now it's taken over one of our major political parties. We may as well have surrendered back in 1960 and saved ourselves the trouble.
A big part of the problem is that we do not give solid definitions for socialism or capitalism these days, and many who now support "socialism" really just want a big welfare state. But that is not socialism; socialism is where the government owns or controls the means of production and the means to deliver goods and services. No country in Scandinavia, often used as "proof" socialism works, is socialist.
And what do we mean by capitalism? That was a pejorative term coined by Karl Marx. And what is it? Is it free markets? Not in it's current incarnation; what we mostly have these days is Corporatism, also known as Fascist economics. Mussolini and Nitler, er, Hitler both practiced corporatism, a form of socialism where there was private ownership but it was in "partnership" with the government i.e. the government controlled them (you can't partner with an entity that has absolute power over you - you obey.)
The great conservative philosopher G.K. Chesterton famously stated that "the difference between a capitalist and a socialist is a bigger paycheck." By that he meant a corporatist socialist and a pure socialist. Both seek the same outcome in the end. Of course a communist would never partner with a capitalist, which is a key difference. In Communism there can be no private ownership and government owns everything. (Actually, Communists do not call themselves that because Communism is the END RESULT after decades of socialism dismantles the concept of private ownership of anything. Communists believe there will be a paradise where we all own nothing and are happy - we just use stuff as we need to and contribute as we can "from each according to his ability to each according to his need'". But a devout Communist would say he is first and foremost a socialist, and that this will eventually change hearts and minds. I would further add before Hitler attacked the Soviets they Communists were quite fond of Fascism and in fact thought it a stepping stone to true socialism "first Brown then Red" they used to say. That all changed after Poland.
The current crop of socialists do not understand any of this nor do they know how horrendous socialist policies have been for the whole world throughout history. Socialism brings poverty and despair and tyranny. But these young skulls full of mush (as Rush Limbaugh used to say) have heard none of this. They only understand "fairness" and think it unfair some have more than others and that some people need help.
And as most have rejected the God of Abraham, Isaac, and Jacob - and of course the Son of God Himself, they seek a god who will fix the world. The god they have chosen is socialism.
So they float the word about as if it were a fungible term. And we let them get away with that. We have GOT to start making them define terms, and show how incorrect they have been.