Himeji made "The Puppetmaster" look like the scientist, likely for some sort of revenge.
An "You treated me like I was disposable, so what would you think when you have thousands of yourself and actually are disposable?" Type thing.
Also, Himeji said that he "...would be able to manipulate the four dimensions..." the last time he talked about the ritual before this chapter, but here he says that he is going to "...create four different dimensions..."
Is that a translation error or a sign that the past future is actually just the past and the past twenty-years-before is actually the present?
Either way, KamiTa-sama would never make a plan like this, he'd just impregnate Fukune himself wait 9 months and then execute the ritual.
PRAISE KAMITA-SAMA!