Then you would be talking about marxist terrorists not marxist.
Pretty similar to not all white supremacists are terrorist but some are.
Not all 2A supporters are terrorists but some are.
Not all jurists are intimidated by the crowds, but some are.
I am certain you can recognize the distinction.
It's the ideology. Read marx sometime.
It's all about taking power by violent force. It's a fundamental aspect of marxist ideology.
Logically it has to be, how else do you expect the have nots to take power from the haves?