Precisely. An image on the internet is NOT A BIRTH CERTIFICATE.
Thus, since Obama has never proffered anything as his "birth certificate" except the pathetic, crude forgery in the PDF file, Obama HAS NEVER PROFFERED HIS BIRTH CERTIFICATE to the public.
Thus, all Americans are entitled to hold that Obama is an illegal alien.
There is no state or federal law or regulation that requires a presidential candidate or a person elected to the presidency to proffer a birth certificate.
As far as Obama was concerned this was always just a campaign strategy.
Under federal law, a U.S. Passport is considered primary evidence of citizenship and identity. A birth certificate can be proffered as “secondary evidence.”
“Types of Acceptable Documentary Evidence of Citizenship”
https://www.law.cornell.edu/cfr/text/42/435.407