Fabrication of a class consciousness

Human history has hitherto been a history of development and improvement of the human condition for as many as possible. From this liberal thesis one could see a problem with the idea of class war.

Class war is possibly a communist fabrication to provide kindling for future wars from the perspective of 1843 for example. 

The obvious problems here are twofold - firstly what if the industrialist class, the first class in contact with emerging technologies gets to such a powerful weapon that the proletarians are decimated by a small number of industrialists in a perverse and maybe even gamified hunt for those who disobey their status quo. They are most likely to end the class war!
As a second problem and again technology is resorted to - as technology advances and becomes cheaper, proletarians get the technologies necessary to empower them to own their necessary means of production - again the class war ends!