Assalamualaikum,
The news that UMNO Hulu Selangor has requested for the Hulu Selangor seat be allocated to them instead of to MIC would certainly mean that the BN chance of winning the seat is heading towards a cul de sac.
If UMNO is successful in wresting the seat to their fold, then there is almost a certainty that the votes of the Indian community would sway away from them, or at best become non active, meaning they would not be voting or they would spoil their casts.
If the seat is again returned to MIC, then BN may have some portions of the votes from the Indian community, but that does not ensure victory.
PERKOSA would work their way to boil up Malay extreme racism and eventually would result in the detriment of BN chances of taking the Hulu Selangor seat.