"ASSUMING that his cancer returned because of the vaccine is irrational and nonsensical
since it could simply be coincidence. (probably was) You are, AT BEST, "guessing".
(not that believing one way or another is going to do much of anything anyway)"
You are obviously unaware of the number of cancers that have occurred following the so called vaccinations. I personally know of three cases where aggressive cancers have returned (after long remissions) within just 2- 3 months of the individuals being vaccinated. I think it is "irrational and nonsensical" to ignore cause and effect - especially where the effect has such a recent common cause.
I suggest you expand your information base beyond TV and newspapers. There are many sources - including the database of adverse effects among the US military which recorded a massive increase in cancers following mandatory vaccinations..
Otherwise, thanks for your other suggestions.