"about 75 percent of the population chose health and safety concerns" though this summary doesn't spell out "GMO being safe to eat" vs. "concerns about more pesticide use".
Opposition anti-correlates with knowledge of genetics: the more you know, the less concerned about GMO safety you are. And in the US (but not Europe), the ignorant considered themselves knowledgeable.
Opposition isn't a left-right thing.
https://arstechnica.com/science/2019/01/on-gmo-safety-the-fiercest-opponents-understand-the-least/?fbclid=IwAR2Eervm2HrE-OISJCZklFp4pmn1S17veJlPyO1mZs8em_-g1LywPlBlMEU
See the