Inflammatory statements--- which we cannot reproduce here--- posted by the said MP and shared widely on social media platforms have threatened retaliation in the week leading to the derby.
And the other side of the divide has hit back, daring the MP and his perceived followers to carry out the threat on Sunday as tensions flare.
It comes amid heightened political temperatures in the two regions due to the recent 'handshake government' deal between President William Ruto and former Prime Minister Raila Odinga.
While the majority of fans have set social media ablaze in anticipation of Sunday's derby, with both sides trolling each other and promising a beating of their opponents on the pitch, the danger of things getting out of hand is real.
And it could cost Kenya the chance of co-hosting the delayed 2024 Africa Home Nations Championship (CHAN) finals alongside Tanzania and Uganda, with kick-off scheduled for August 2.
Speaking on Thursday, the chairman of the Kenya LOC for 2024 CHAN and 2027 Africa Cup of Nations, Nicholas Musonye allayed fears hosting the Mashemeji Derby at Nyayo was risking the country's chances of hosting the continental event.
"Nyayo needs test matches of such a high caliber ahead of CHAN. We have made it very clear to both teams that no violence will be condoned," Musonye told Standard Sports.
"Both teams know the consequences of any violence and together with the new federation, we condemn all manner of violence."
According to the long-serving football administrator, a robust security plan is in place to deal with any outbreak of violence and any team that violates the law will be sanctioned heavily.
On being pressed on the likelihood of matters boiling over despite the well laid plans as it has happened before at the same venue, Musonye urged fans to maintain law and order.
CAF banned Nyayo and Kasarani from hosting international matches in October 2021 after failing to meet the required standards.
And earlier in September 2010, world governing body Fifa expressed concern over the security of Nyayo and ordered its capacity to be reduced from 30,000 to 18,000 when it banned the stadium from hosting World Cup qualifiers.
This came after Fifa registered dissatisfaction at the over capacity of the stadium with some fans hanging on rooftops in the matches between Harambee Stars versus Guinea, Zimbabwe and Tunisia.
But tragically, the warning was never heeded.
On October 9 that year, Stars played archrivals Uganda Cranes at Nyayo with minor scuffles.
And worse was to come barely a fortnight later (October 24) when seven fans died in a stampede when Gor hosted Leopards in a Mashemeji Derby at the venue.
Since then, a number of stadium bans have been slapped on Nyayo and its capacity reduced to 15,000 but clearly, this was not observed last weekend when Stars played Gabon.
According to FKF, 19,880 fans will be allowed to purchase tickets to today's Mashemeji Derby (VVIP/80, VIP/1,800 fans and Terraces/18,000 fans).
And with Kasarani the only other venue cleared to host CHAN, the country will hold its collective breath that nothing goes wrong at Nyayo today.
-The writer is the Line Producer, Sports at CGTN Africa