This is what the Kisumu Sikhs put up:

It looks to me like the image of a person in solemn prayer - it could be a person of any religious persuasion....Christian, Hindu, Buddhist, Muslim, or even Sikh etc
I wonder whether the protestors would have protested if the very same monument was placed there by a Christian church.
By the way; this is the Symbol for Sikhism:

Nothing is real unless it can be named; nothing has value unless it can be sold; money is worthless unless you spend it.