Yes, and as such, he takes a view that a flat earth is an appalling idea. He wouldn't be able to research it with an open mind. He would (or always has) had a pre-conceived notion that the earth is a ball.
Agreed. Sungenis had made up his mind beforehand, just like some posters here. Many of his arguments are dismantled and shown to be dishonest by Edward Hendrie here ... https://www.amazon.com/gp/product/194305603X/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=194305603X&linkCode=as2&tag=httpwwwchanco-20 />
I listed to part of the Biblical debate between him and Skiba, and Skiba demonstrated that Sungenis was (deliberately?) mis-representing the Hebrew terms he was arguing from. I don't feel that Sungenis is looking at all the evidence openly, but merely trying to explain it away.
I see hundreds of arguments and demonstrations from Flat Earthers that are not refuted. Meanwhile, 90% of glober arguments are easily debunked as not being cogent ... and often times openly dishonest. There are a handful of issues out there, but the massive preponderance of evidence is on the side of the Flat Earthers ... if you're willing to look at it with an open mind.