Picking fights over religion

I suspect this will be a flame war magnet. On the other hand I feel compelled to write it.

First a bit of backstory. My wife enjoys, often and with engagement, discussing theology with her new friends. One of them, a pentecostal christian, gave her the book I don't have enough faith to be an atheist by Norman Geisler and Frank Turek. I picked it up while visiting her, looking for some book to read, and have forced myself to read through most of it since.

The authors try to prove the correctness of Christianity over all other religious attitudes, but most importantly, prove that Christians are right and Atheists are wrong. And the way they do this is oftentimes insulting, very often ignorant of how to deal with the logical tools they try to use, and constantly reeking of a lack of objectivity in their purportedly objective exposition.

I'll point out a few points which really grated when I read them, or which came across as just purely obnoxious in this post, and discuss why I take such issue with them.

Bad background research

I later learned that my expectations were too high for the modern university. The term "university" is actually a composite of the words "unity" and "diversity". When one attends a university, he is supposed to be guided in the quest to find unity in diversity - namely how all the diverse fields of knowledge (the arts, philosophy, the physical sciences, mathematics, etc) fit together to provide a unified picture of life. A tall task indeed, but one that the modern university has not only abandoned, but reversed. Instead of universities, we now have pluraversities, institutions that deem every viewpoint, no matter how ridiculous, just as valid as any other - that is, except the viewpoint that just one religion or worldview could be true. That's the one viewpoint considered intolerant and bigoted on most college campuses.

(emphasis as printed, G&T p 19)

First off, the stated etymology is false. The Online Etymology Dictionary states

c.1300, "institution of higher learning," also "body of persons constituting a university," from Anglo-Fr. universit