If you're really that surprised by this, then you might want to look into topics like Original Antigenic Sin and vaccine-enhanced disease, especially antibody-dependant enhancement, which is the reason that previous vaccine candidates for coronaviruses (which would be a huge market, given how many old people have died from them each year, historically) haven't progressed beyond animal trials.

If the spike is toxic and widely distributed in the body from the vaccine, it seems plausible.

Especially if the spike protein produced by the vaccines has been modified to be more stable (pseudouridine vs uridine) and therefore more immunogenic (toxic), and is present in significantly larger (orders of magnitude larger) quantities.

How did you feel about mask mandates and lockdowns?

Felt like they were ineffective and that the Barrington recommendations were a better approach to follow, especially as time went on and more data on the nature of it emerged.