Capitalism is certainly not characterized by the absence of violent interference.
To the extent that certain aspects of capitalism lead to violence, those are elements that other parties -- generally corporations or governments rather than writers or philosophers -- added to the ideology.
People die trying to break out of non-capitalist countries, while they die trying to break in to capitalist ones. That's one possible way to tell the good guys from the bad guys.
Ahahah, I absolutely love this sentence. You might have said the quiet part out loud though.
“You gots to understand”, said Fat Tony, “I'm not a violent man. The violence simply comes in when you interfere with my business.”
But capitalism prevails and may be the best system there is for now because I cannot fathom a change in system overnight that would not result in mass suffering for (almost) everyone.