Environmentalists believe that the legitimate commerce of extracting oil from under the Arctic is likely to cause a catastrophe, so yes Greenpeace is trying to disrupt it by peaceful protest.

Whaling was legitimate commerce too, but I am glad that Greenpeace went out to disrupt the killing and raise awareness of what was going on.

Likewise atmospheric nuclear testing.

Likewise the potential destruction of the precarious Arctic ecosystems.
And for what?