To me there is a much more sinister angle to this.
The fixation on embryonic stem cells is way too passionate and obvious, suspicious in itself because R&D into the practical use of such cells is a constant dead end, since those cells are in a state of flux, not stable and settled like the adult versions. The embryonic cells are nearly a blank slate, if you will, possibly available to be re-programmed, re-molded into something else, above and beyond from what they were originally. So, what are the proponents of embryonic stem cell research really up to? Probably not to 'fix' or 'cure' anything, but to create, from malleable raw material? Is someone or a group of someones thinking of intruding on the domain of the Creator - perhaps even thinking that they could challenge the Creator Himself? Wise fools - tampering around with things they could not possibly ever fully understand and certainly not ready for a myriad of unintended consequences they could unleash upon themselves, if not the world at large. The Bible is full of warnings regarding such foolishness, and they disregard such warnings at their peril.
Yes, creating chimeras is proscribed, and would be something the left would pursue as an affront to the Creator,
but destroying those made in His image is a more direct assault - killing God in effigy.