The global Left has to have a plausible reason to even attempt confiscation, and that requires the Long Game. The only thing that will fit that bill is massive social unrest inflamed by the collapse of the various institutions and traditions that have made the U.S. what it is and keep the lights burning...industrial, economic, energy production, healthcare, education, stoking racial disparity, selective enforcement of existing laws, creation of laws by executive fiat, you name it, we have it NOW.
For example: [redacted]
Don't even try to say people like me are paranoid because we all know our leftist regime (R and D) IS doing everything it can to fundamentally transform this nation, and to a degree they've already succeeded.
Still don't believe it? If the end goal is to make every aspect of American life uncertain and unstable, controlled at the behest of the federal government to the point of provoking massive civil unrest, would they be doing anything differently?