Why is the owner of the means of production unjustified in having ownership of those produced? He put his capital at risk to start it up, and he fairly compensates people for their labor. They are neither forced into working for him, nor prevented from leaving at their leisure (in the US, at least) if they do not feel that they are fairly compensated. They also have the ability to come up with a new product or improved process to become the next owner themselves.
Marxism is the greatest bastion of those too lazy to innovate and care for themselves. It may look nice in paper, but it failed in the USSR, it failed in Cuba, and it's failing the Chinese as we speak, despite the claims of such exalted "intellectuals" as Elizabeth "I'm a Cherokee!" Warren. IIRC, marxism (lower case 'm' intended in a derogatory manner) calls for 'from each according to his ability, to each according to his need'...how many college marxists actually believe that? How many would be willing to apply that to their grading system? Probably only those failing.
And just because I can't resist violating Godwin's Law when answering a commie...who has killed more people, Hitler's Nazis or Marx's ideologues? The Cambodian killing fields, Stalin's purges, Chairman Mao's purges. There is more blood, hate, intolerance and exploitation under the Marxist ideology than anything else. The Robespierre period of the French Revolution is on a much smaller scale, as is wahhabi-ism...those are the two closest competitors I can think of.
All that being said, if you are a US citizen, the first amendment does guarantee your right to have and espouse completely stupid opinion, as it guarantees my right to ridicule you mercilessly for having said opinion. Regardless, please keep your marxism to yourself and stop trying to spread its hatred, thanks...the tens of millions of people who have died under its thumb will thank you.