He has basically polished the George W. Bush "You are with Us or Against Us" 911 Speech. If he intends to use the occasion to institute a draconian state then he can start saying his goodbyes. He has already lost North Eastern Province and may be at the brink of losing large swathes of Eastern. Tana River Delta is enemy territory all the way to Hindi in Lamu West.
Digo and Giriama areas (Kilifi and Kwale) are simmering just below the surface. His activities in Eastleigh have created a climate of tolerating government but not doing anything to support it.
His exclusionist policies have isolated Luos and Luhyas. The appointment of one "Luhya" Minister who lives in Kiambu and has lost all contact with Western is one huge insult against an area that saw the largest number of ministers from one ethnic group under Moi and Kibaki governments.
So on that backdrop, he wants to start a war against politicians in these areas. Kenya is a strange country where tribal demagogues command a lot of influence. Arrest some useless MCA and you have a huge problem on your hands. Uhuru isntead of consolidating the "Kenya" he still has, now wants to play in the hands of Al Shabaab.