Marxists most easily take over top-down governments and societies.
If societies are used to be control by a king, czar or general, with their central planning and control, then its relatively easy to for marxists to grab control of the levers at the top of that structure.
the USA was once place of dispersed powers, local control and small government. When reading the words of our Founders, simply replace “Marxist” with “king” or “tyrant” (marxists were unknown to our founders) and you will understand exactly why they designed the system they did.
Now, in the name of Progressivism, we have created a HUGE central government, reduced the powers of local governments (that’s why local police and elections are in their sights), and are printing unlimited paper money. It won’t be long before Marxists simply grab control of the levers at the top.
While historically true, that approach has been difficult in the case of our nation.
The Left has quickly realized the economies and speed to be enjoyed by first taking power at local elected levels (mayors, city councils, boards of supervisors, D.A.'s, etc). That is where the voters are and those offices are much easier targets.
It is obvious local terrorists-rioters are currently allowed a broad, if not shocking amount of freedom of conduct that would just yesterday be regarded as criminal.
IMO, the future of the nation will turn on the Electoral College during the next two cycles, along with actions taken at the federal level.