Maka,
We had similar, but less caustic (and not in print), things said about us for a time. Then 2 Kubota dealers, one John Deere dealer and one NH dealer, all within 40 miles, went out of business in the last two years. These were decades old well established businesses. Meanwhile we move hundreds of Mahindras and Bransons a year through our facility.
It is difficult to respond to customers when they tell you the awful things said about you, one way we respond is saying "If they really knew us and really knew our tractors, they wouldn't say things like that." It is true for the most part and very inoffensive as you are not lashing back. At the same time, it clearly puts you on the high road. Of course if things really get nasty, you may have to fight back.