In this sentence, the word "facile" can mean the "easy", "simplistic" reply or statement about who is to blame. Sometimes it is hard to understand who is to blame for a problem. There are often many factors involved with a problem. We cannot always give a "simplistic" answer about who is to blame. Hope this helps

Facile, in this context, describes something that is said without regards to the issues beneath the surface. Basically, it is to oversimplify or to be superficial about something. A recrimination is an accusation made in retaliation to someone else's accusation. This sentence is saying that these kinds of accusations should not be made without considering the situation's deeper issues.

Superficial, simplistic recrimination, complaining about somebody with a rash judgement, without going into the matter.