It's as simple as this DWA:
You believe bigfoot to be a real animal. To support this you rely most heavily on anecdotal evidence. You also point out alleged footprints and expert testimony supporting that evidence. There is also some emphasis placed on native lore from proponents as well. You also believe strongly that the PGF contains footage of a real creature.
I believe bigfoot is not a real animal, but is a social construct born of hoaxing. To support this I can point out many, many proven examples of hoaxing with bigfootery. This fabrication crosses various types of evidence: footprints, reports, photographs and video footage. To also support my position is the lack of biological evidence that holds up under scrutiny. Many samples have been provided in the past and they all come back as known animals, synthetic, or too degraded to analyze. The biological evidence to date has failed miserably.
To offer an alternative source for the many sighting reports I point to the history of fabrication and deceit that can easily be found in this phenomenon as well as other sources such as the much documented faults and weaknesses of human perception and the ways that certain mental illnesses such as schizophrenia can cause a person to experience something that never actually happened. Articles in scientific journals documenting this are many and easy to find.
The photographic and video evidence, as it were, to date is horribly ambiguous. Terms like blobsquatches are used freely by both skeptic and proponent. Hoaxing bad bigfoot video seems to have become a popular past time on youtube. Sadly, even the bigfoot video evidence that is not universally panned by both sides is still too ambiguous to prove anything, i.e. the PGF.
Footprints also have been analyzed and many have been proven to be fabrications, even sometimes after a bigfoot expert has declared them genuine. Features such as dermal ridges are not universally accepted and have also been demonstrated to be easily reproduced as an artifact of the casting process.
But, for me, the ultimate damning point that obliterates the bigfoot argument is the utter lack of proof after all this time. Bigfoot is everywhere, yet no one can get a sample of one, a photograph of one, or video footage of one that is clear and unambiguous. When I add up the points I previously mentioned with the complete absence of real, solid evidence it quickly becomes clear that bigfoot only exists in the minds of those that believe.
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Please note that I have made my case calmly, rationally and without emotional rhetoric or deliberately talking down to you. I stated your position I think fairly and with respect. I would appreciate it if you could try to craft your response with similar consideration.