And the worst part is the anti-GMO crowd are damaging their own cause.

Pretty much everyone admits Monsanto is a terrible company, but one of the main stumbling blocks to doing anything about them is the anti-GMO crowd. It works the same way as the truthers screwing up any ability to talk about Bush using 9/11 as a political tool: As soon as you start talking about it someone will pop up with "Bush did it! Alex Jones said so!" and utterly derail the conversation.

It's tempting to think some of these people are actively funding and pushing the conspiracy theories against them, since it makes anyone that opposes anything they do look nuts. Does that make me a meta-conspiracy theorist?

I love that phrase.

Since you have a conspiracy theory about conspiracy theories, wouldn't that make you a conspiracy theorist²

When people become attached to a belief to the point of seeing it as a "cause" and basically a matter of good versus evil, they will go to any length of mental gymnastics to throw out whatever might say otherwise. Since very few things in the world actually boil down to matters of good and evil, that's pretty much always the wrong reaction.