They never denied Tinubu nor said his certificate was a forgery. What they said is clear. The certificate he tendered to INEC is a ceremonial replacement certificate, which is usually issued by third-party vendors. Also, Elnora Daniel never threatened to sue Bola Tinubu. That is another fake news story.
I do not support Bola Tinubu. However, we are likely to win future elections if we oppose based on truth than if we do so based on lies. But if you are still in doubt, why not contact Mr. Caleb Westberg directly at firstname.lastname@example.org or +1 (773) 995-2517? I communicate with them, and I assure you they will respond to you.