Yes, because people are morons and care more about how messages are delivered than the message itself.
It is possible to condemn Greenpeace for stupidity and also have much more condemnation for those destroying the environment as rapidly as possible.
I condemn Greenpeace for being more a part of the problem than they are a part of the solution. Absent these ill-informed nutters blocking nuclear power at every turn, we could be generating a much larger fraction of our power via almost carbon neutral fission by now, and the coal could stay in the ground where it belongs.
Good intentions are all very well, but they don't excuse counterproductive and damaging acts. Greenpeace do more harm to the environment than good, and this latest incident is just a tiny example of the vast harm this bunch of well meaning idiots cause.
Action without a basis in rationality rarely achieves a net benefit to society; and Greenpeace are an irrational cult, made up of people who genuinely believe that everyone would agree with them if only they were 'aware', despite their beliefs being founded in emotional nonsense, childish over simplification of complex problems, and a deep devotion to the naturalistic fallacy. Fucking idiots.