Jup, had to listen a presentation about this study in a GMO lecture a few years back, and even before we hed heard of the drama that followed we found it suspicious.

• very large confidence intervals,
• Rat species used in this study were especially developed to get cancer (for research)
• No real negative control group
• And later on we found about this guy's anti-GMO social activism

So yeah, I'd take this study with a grain of salt

EDIT: Links to different versions of the article: orig (doi:10.1016/j.fct.2012.08.005), republished ( doi:10.1186/s12302-014-0014-5)

if you watch the video i linked in my previous comment here, you will see that it is the author of the paper that is linking the two together, not me. in fact, i didn't even write the headline here, since it came from james corbett - the author of the video i linked to at the top of this thread. however, as far as i know - based on the information available to me, the work of the scientists involved, does indeed link gmos and tumors together - if only within the limited scope of the work performed. as noted in the 2nd video, the research was limited to some extent, due to the difficulties faced by researchers in acquiring GMO plants/seeds to test - while conforming to contractual and financial limitations placed on them by the manufacturer.

this is a video presentation that detailed the case and the experiments performed. the presentation provides some background information and the overall picture is not as you claimed here: https://www.ureka.org/videos/watch/3947/gmo-threat-against-humanity-proven