But it's been ten years since I've been involved with local community organizing and I know a dogwhistle when I see one. Whether or not the original poster intended it to be a dogwhistle or just formed that opinion memetically after uncritically absorbing astroturfed 'drain the swamp' rhetoric, it all leads to the same place where private equity and other investors get to run rampant with little regulatory oversight.
A broken clock is right twice a day and all that. Regardless of who you witnessed parroting the rhetoric and to what end that doesn't necessarily mean the rhetoric is wrong in and if itself. In this case I'd say it's quite obviously correct.
As I pointed out, the reasoning you expressed doesn't work. Your examples do not support the position you were advancing.
As to disputing the accuracy of individual points you'd need to be specific about what you're taking issue with. It's not on the other party to provide evidence when merely voicing agreement with something someone else said (or rather my expression of agreement is itself the evidence of my claim that I agree).