The difference is that the Bible condemns racism and slavery while the survival of the fittest, when applied to our own species, sanctions it.
Abolitionists frequently quoted the Bible to support their cause.
Bible reading is the inspiration for anti semitism.
The jews for their part have themselves as the chosen people.
Slavers quoted the Bible, and found full justification
Sure, abolitionists found their justification too.
The popularity of the Bible is in no small part
because it says whatever you want it to justify.
Direct quotes. Slavery, war, racism, environmental
distruction, pick any or all, add more.
It's in there. Sanctioned by scrip.
Now, a theory based on detailed empirical observation
(Which nowhere BTW says , " survival of fittest" ) cannot
" santion", suggest, direct imply or do anything else
any more than it can prescribe vallium.
Nothing in Darwin, nothing in ToE is in any way
favoring racism or slavery. It's concocted falsehood to
say there is.
People can, and as you have, do misunderstand or deliberately
misinterpret what the theory describes, and find in it ammo for
their ideology.
In that you are doing the exact same thing as Goebbles, Goering,
and of course, Herr Schicklegruber.
We find it neither edifying, honest, or admirable.
You may have heard of preserving genetic diversity?
It is lately much in the news.
Racism, killing off other "races" is in direct opposition
to maintaining diversity.
It is seriously ignorant and as wrong headed as
wanting to kill jews coz they killed Jesus, to think
anything from Darwin "sanctions" racism.
This has gone on long enough. It's a pernicious idea
that has no place among decent folks.
I call on anyone who buys into this
garbage to cease, and go forth as a better person.