I have no idea what the "god factor" is.

We as a species have been dining on beef pork, chicken, swimming fish,
shell fish for a very long time and continue to survive and multiply.
We have discovered that as long as you cook meat the chances of
ingesting a harmful organism are very low. The bottom feeders that you
express concern about may infact pick up poisons, but the larger
non-bottom feeding fish may actually have greater concentrations of
nasty things like mercury because they eat more of the smaller shorter
lived fish and tend to live longer. I would be far more concerned
about the non-organic beef sold in the stores that has been injected
with growth homones, estrogen and antibiotics that appears to remain at
some low level in the meat after slaughter.

We are better off looking toward the scientists and health authorities
for advice about healthful eating than the bible.