The Letter of Jude has a sharp cutting edge which exposes raw flesh. That indeed is the real problem: flesh in the church. This little letter will cut through that and expose it, and that is going to sting. But we are sensitive, and the real reason that we neglect a passage of scripture is that we do not like it.
The church can be destroyed from inside; it is not external dangers, it is internal dangers we need to be concerned about, and this is Jude’s concern.
Every Christian must live dangerously. This world is not occupied territory, so it is the most dangerous thing to be part of the church.