About LDAP and what programming language should be used, I am not familiar enough with that program to answer the question. I agree with you that it is general

About LDAP and what programming language should be used, I am not familiar enough with that program to answer the question. I agree with you that it is generally better to not to fold to these kinds of attacks. However, the README.md does mention other reason why they would not really want to maintain it for sure anyways. Furthermore, the maintainer can make their own decision about what to do with it (whether or not other people agree with it). And, since it is FOSS, it is not much of the problem if the maintainer decides to stop maintaining it, since FOSS is possible to fork the project and other people to work on it too, anyways. This is not an excuse for writing such a bad email message, but nevertheless someone might do so and therefore you will have to decide how to deal with it. (I think it is best to ignore it, but of course everything will influence anyone)