The comment is not dog whistling...people need to stop misusing political terminology. It renders words meaningless. Considering that you depend upon hiding behind words, it is best not to deconstruct your own shield.
Conflating neoliberalism and neomarxism together is textbook dog whistling. I don't know of anyone on earth who even identifies as a "neomarxist" but we all know what using those terms interchangeably means for ones held political ideology...