Yep. He went on & on about crony capitalism, i.e. capitalism corrupted by big government control & collusion, which is what we have now. In addition, he was pretty much anti-everything. Very negative. Only positive thing in there was the unmodified Communist creed. Hard to categorize, but a 60s-reject, counter-culture, commie sympathizer with anarchist tendencies IMHO.
He was also very anti-religion.
He was a disenchanted liberal who didn't hang on long enough to become a conservative. His mostly valid anger at the outrages of the system got tangled up with his expectations of the system serving people in a liberal fashion, rather than a limited government fashion. And hell hath no fury as a liberal scorned.
Someone should dig up his voting record and political registration over the years - I'd bet he was a lifelong registered democrat. And that fact, once established, should be shoved in Pelosi's ugly face very publically.
I interpreted the couplet at the end as pointing out the similarity between the Marxist system and the corrupt pseudo-capitalist system that has been imposed on our country. Not praising Marxism (because certainly nothing else in the letter did that), but pointing out that corrupt pseudo-capitalism doesn’t offer any more freedom than Marxism.