The idea is so ridiculous and so wrong in so many ways, and insultingly wrong to anyone with any background or understanding of the field, it's almost not worth explaining to anyone who takes it seriously. It's like asking someone with a good knowledge of history to prove WWII actually happened. But anyhow, seeing as you seem to give it credence, (on what basis I don't know) here is some of the basic detail of why it's wrong:
"As anyone who remembers the early days of molecular phylogeny knows, one of the oldest techniques for telling how closely related two animals are is to attempt to hybridize their DNA. Human and chimp DNA hybridizes easily in a test tube, since it’s roughly 98% the same. Other primates don’t hybridize as well, since they share fewer common alleles with us. Long ago, the early DNA hybridization studies showed that pigs and primates have very few alleles in common, about the same as primates share with any other distantly related order of placental mammals. As both P.Z. Myers and “Artiofab” pointed out in recent blogs, however, there are huge problems hybridizing pigs and chimps. Pigs have 38 chromosomes, chimps have 48. You simply can’t have a fertile hybrid with this many mismatched chromosomes. Even human/chimp hybrids are impossible for the same reason, because we have different numbers of chromosomes. And huge sections of chimp and pig DNA are radically different, so even if he did manage to separate the strands in a lab and hybridize them, they would not continue to develop. Then there’s the problem with the sperm of pigs even recognizing the ovum of a chimp, since the eggs have their own protein coats that are specific to their species, and prevent insemination from alien sperm. In addition, there’s the problem with immunological rejection: any tissue that is foreign to us is attacked by antibodies before it can get very far. This is why transplants of organs between species is very difficult. (Immune rejection is the reason for the failure of creationist Leonard Bailey’s unethical experiment in replacing the defective heart of “Baby Fae” with a baboon heart, rather than a heart from a more closely related organism like a chimp). The pig’s sperm would be wiped out by a big immune reaction, just like any other invading virus or bacterium or foreign body. ...
Pigs and chimps (and humans) are separated by at least 70-80 m.y. of evolutionary divergence into lineages which have long gone different directions—
hybridization between such long-evolving groups simply doesn’t happen.
These genetic and anatomical differences are so difficult to overcome precisely because both lineages have been separated since the early radiation of the placental mammals, probably in the latest Cretaceous 70-80 m.y. ago, when dinosaurs still roamed the planet. The two groups diverged long ago and have been evolving separately since then,
so there’s no way lineages from these two very different parts of the placental family tree can ever hybridize. Again, the long list of mistakes he makes in citing shared plesiomorphic characters shows that this guy is not up to date on phylogenetic thinking. (Even more bizarre: he thinks platypuses are crosses between birds and mammals, even though those two lineages have diverged 300 m.y. ago).
There’s no point in beating this ridiculous scientific argument to death any further. But this raises the next question: who is this Eugene McCarthy, and how did he go off the deep end of crackpot science?"
https://www.skepticblog.org/2013/12/04/hogwash/
Etc etc
If you're still not convinced, try to examine and understand the diagrams below.