The opposition has weaponized farmers, this game can only be fought with farmers. Government can't come out and say "this has nothing to do with farmers, they're trying to bring down the government." That will make them look weak, insecure, and stupid, with 303 seats in the Lok Sabha. So the strategy should be to make farmers generally happy, so the opposition looks weak/insecure/stupid banking on farmers for a mudda. The facts of the farm acts are already not on their side.
That said, this "farm cess on fuels" is very below-the-belt on the rest of us. We know MSP is paid for by our taxes, but you're making it more obvious.