The original owners of nairobi were the maasais to the south/kajiado, kambas to the east/syokimau/kangundo rd and kikuyus to the north west/kiambu/thika.muthaiga/karen/dagoreti. The colonial govt then appropriated the land to themselves then they allocated the land to settlers from Britain. These settlers then sold under the swinnerton plan in the 1950s and the little that remained govt land was appropriated by kenyatta, moi and kibaki govts.
http://en.wikipedia.org/wiki/Swynnerton_Plan
Ministry of agric has as much rights to the land as the original african tribal owners so they should be pliable to discussions and let the current owners live in peace.
As Iron Sharpens Iron, So one Man Sharpens Another.