Inceldom going mainstream is really bad for everyone. It will drive Incels more towards self hate as well as a worsen of already bad mental health thus violence of general virgin and or socially shunned men will carry on a similar action as Elliot Rogers - thus calling it an 'effect' does make sense, but on the other hand it also disregards the fundamental importance of men in our society and might even put non incel, non virgin men into the Blackpill community.
The rise of MGTOW and Redpill is already obvious in the West, if womens dating standards and irrational expectations increase even further and on top of that make Inceldom a mainstream, where every non social media present Sub8 male is essentially becoming an "Incel" we will eventually face a, most certain, social collapse. This combined with an already upcoming rise of Hyperinflation might break the west completely.