Good points. I'll admit the distinction isn't completely black and white to me. I do think that there is a distinction between NGOs and commercial entities. One intuition for that is that we've got words to distinguish between the two. And as you note, its the purpose of the NGO to pursue its agenda. For the commercial entity, the science in these cases is often accidental to their main purpose, which is to sell some other product.
Are you aware of NGO-funded science on the level of industry-funded science?
I don't think this NGO/industry distinction is the strongest argument in showing the statement isn't "picking horses". If the scientists were being political in, say, treating GMO separately, or creating FUD around GMO, I think it's likely they would have specifically included GMO in their statement, as if they were against GMO, it would align very well with the climate change and endocrine disruptor positions they take.
Edit to add: I'll also come clean on my motivation for posting. There are so many accusations of bias that I'm trying to examine statements as honestly as I can, avoiding knee-jerk reactions as much as possible. For example, it would be unfair of me to assume that because you bring up GMO that you're a "climate change denier" or some other unfounded accusation. I see way too much of that type of behavior, and it does nothing but deepen the divisions between people. That's not useful if I actually want you to, in turn, treat me charitably. After all, we're in a discussion forum, right? :)