1. Points in such books are to be divided into two categories: observations and explanations.
2. Explanations can be again divided into two kinds: 1. substantiated from previous sources 2. Author's own conjectures, guesswork etc.
3. These observations seem to be focused on /limited to social relationships among Brahmins of different parts of India.
3. "Gurjaras are included among Drāviḍas" - observation; one would ask for corraboration from other sources since this is not 'established' /well known/popular.
4. other Drāviḍas do not have any educational, ritual or marriage relations with them- observation; gujarati (garjara = gujarati? or western Indian?)-south Indian social relationships were not very intense, probably.
5. Intrigue of the author making him for look for explanations: 'why no social relationships of south Indians with Gurjaras though they are co-draaviDas?'
6. Gaurjaras are similar to gauDdes'a Brahmins or Kerala Brahmins in having 'anācāra'-observation used as explanation for the above observation' . 'anācāra' is not immoral but violative of (Brahmin) religious code. .'anācāra is perception.
7. Ācāryaśāpa is the explanation probably invented by those sharing the perception of 'anācāra.'
8. Fish-eating among Bengali Brahmins, marital relationships of Kerala Brahmins as part of the matrilinear system of certain non-Brahmin communities could be the perceived 'anācāra.'