Its not crazy if we just talk data and statistics. I find the intersection with vax mandates and the overwhelming datasets coming from Germany and Israel and the UK quite interesting. So lets just stick with facts and debate those.
The authors have never published a paper in epidemiology, and trust me, there are plenty of pitfalls even very smart people can fall into when they don't understand the ins and out of a field.
And just the same, it happens within a field of expertise. Biases, groupthink, egos, etc. None of us, including science, is immune to such things.
The authors are data scientists. So articulating what exactly the pitfalls are that disqualify them from working with an epidemiological dataset would be really helpful. As a non data scientist, it is not obvious to me what qualification they are lacking when it comes to working with an existing dataset.