First off, this is a false dichotomy. It doesn’t matter which theory makes more sense, as it is entirely possible that neither theory accurately describes reality.
In the second place, environmentalism isn’t exactly hurting for money (just ask Al Gore!). The amount of money that gets poured into researching global warming is pretty massive. The federal government has handed out at least $50 billion to global warming research since 1997. From what I can gather (and this is by no means conclusive), it appears that pro-warming researchers have received more than twice as much as skeptics (counting all sources of funding, not just the federal government). Thus, presenting the issue as “poor, honest scientists” being pitted against “big (profitable) oil” is simply dishonest, and there is no excuse for it.
In the third place, massive conspiracy is both misleading and accurate. If the East Anglia scandal is any indication, there certainly have been some global warming apologists that have conspired to mislead. On the other hand, it doesn’t appear that there is a massive conspiracy as much as there is simple correlation of interests, which is mostly a case of self-selection. So it’s not so much that the apparently vast majority of environmental scientists are all secretly colluding with one another as much as they have coinciding interests and are thus acting together.
In the fourth place, the implication of intentions is irrelevant. It seems likely that most global warming apologists are well-intentioned, albeit ignorant, illogical, and not given to introspection. Thus, they don’t intend to destroy the global economy. Unfortunately, that will certainly be what happens if they have their way in setting environmental policy. And so, their intentions are irrelevant; drawing attention to them is a false flag.
In all, this amusingly illogical and counterfactual “infographic” feels more like a piece of propaganda than a legitimate argument. And if the greens are resorting to propaganda, you can bet the movement is on its last legs.