There is nothing in humanism per se
that can define anything as truly right or wrong. Certainly there
are things that we all recognize as wrong – rape, murder, etc. –
which seem to be inherently recognized among civilized humans and
most religions, but there are no boundaries actually codified in
humanism.
Humanism is a form of specie-ism that is wide open to
arbitrary definitions – for instance: Hitler defined the Arian
race as human, and blacks as mere animals. Humanism recognizes all
races, but apparently defines children who have not yet been born as
non-human (although millions who have been killed because of this
definition were quite viable, and a number who had actually been
aborted have survived to healthy adulthood). Given the viability
factor, this definition is totally lacking in biological legitimacy,
yet it is very effectively executed as a social, political, and
convenience expedient.
In Humanism, there is no line that must be
crossed to go from a Mother Teresa to an Adolph Hitler.
It would
be in the best interest of humanity for there to be a lot fewer
people on earth – in fact, a tiny fraction of the current
population would be optimum for the environment of those chosen to
survive. I suppose it would be assumed that the “most intelligent”
would be favored in any such proposal, but historically it is the
most primitive who have lived in balance. Bottom line: Humanism
could be used to justify mass genocide (ask over 30 million unborn
children) – I rest my opinion.