Thanks for posting your query. We have just started these forums and we have not yet had many of our Facebook members move over here. I am sorry for the inconvenience, but you should get a response if you post your query in the Facebook group of the Association of Hebrew Catholics. If you are not a member of that group, please apply and I will approve you.
In addition to our Facebook group, you can try catholic.com, which is a good Catholic apologetics site. Another avenue is Marty Barrack’s secondexodus.com. Marty is a Hebrew Catholic and his site explains much of the Jewish roots of our Catholic faith.
Personally, I have never studied the geography, weather, etc. of the region of Israel that the person you reference writes about. However, I would be very suspect that more than 2,000 years after the fact, someone comes up with a theory that debunks the New Testament. There are many Jewish people who have tried, because they don’t believe in Jesus.
I hope you can find an answer from one of the sources above.