@mutageno I am willing to bet that in some way those environmentalist depend or make use of the products of those corporations. It does not have to be direct for it to be the case. In some way, they would find that something they see as a given is no longer available if those corporations were gone.
Not saying "corporations did nothing wrong," but you have to consider why those corporations are there and why they are polluting. It is not because they are Captain Planet villains.