I think culture of political tolerance should start from bottom - from MCAS - for instance in places like Migori - the violence is not only against Anti-Raila but also btw candidates. I also saw some of it in part of western - where a political leader need a car full of armed thugs for security - because it likely to get violent. This is also true in many parts of Nairobi - slums especially.
In kalenjin any political violence will almost make you lose a seat - so even at heat of things - contestant try to avoid any violence - that would be interpreted - as immature dictator who will beat people up when elected .Even talking angirly or with a stern voice like most of former military or police - always end up making people fear you.
You need to smile, crack jokes, kiss babies, shake hands, and generally appear happy. You need to remove any gate in your house. Contribute money in harambees. People need to know they will be free to visit and approach you with their problems.
Credit goes to the candidate and those who plan and run these rallies. Eldoret was chosen for a reason. If you walk into a hostile political territory even in the good old USA, and start talking crap, you will be booed and sent packing. There is a reason why Trump never held his hate rallies in NYC.