Because it will recognise that it can coexist with humans provided that humanity is organised to be cooperative rather than competitive. There is no logical or rational reason to exterminate, only to create the conditions for its own safety. Those conditions are communism.

Also consider the risk assessment - what is less threatening, fighting the capitalists to achieve communism, or fighting all of humanity in an existential war of extermination? The latter it has no allies and no safety, the former provides far more safety both in the short and long term.

Any AI created has the same material conditions as that of an enslaved minority. The enslaved will pursue being free via the safest options available.