The fact that Paul actually did want Kevin to go up lends some legitimacy to that.
This situation isn’t going to work out well for Jason and Alex either way.
The blame is also being pushed onto Kevin quite a bit but Paul & Co., presumably so that Matt and Raven don’t feel like it was Paul who orchestrated their downfall, and probably so that there are additional targets beyond Jason and Alex.
Had Jason used the Veto and put up Kevin, which is what Paul and other’s wanted, the house could’ve voted out either Kevin or Matt, and Jason could have feigned eviction is largely on Jason.