250 signatures on a letter at a company with 35,000 employees is an eruption of dissent?
I'm reminded of a quote about urban warfare, something like "In a city of 10 million, if 1% of the population opposes you, you have 100,000 adversaries." That seems to apply here.
0.7% of the company is writing to complain? Okay - what amount do you expect to complain? How many would complain about the opposite direction?