Marxist definition: class struggle, abolition of capitalist property, collective ownership, systemic change.

Starmer’s record: social-democrat, pragmatic, incremental reforms, accepts market economy.

Why he's not Marxist: avoids ideological rigidity, no revolutionary agenda, shifted toward center-left, compromises for governance.

I suggest reading the Communist Manifesto, so you know what to argue against if nothing else. It's, y'know, free.