you're asserting that something is true (that GMO foods have no dangerous or undesirable side effects) because of lack of evidence to the contrary. that is called argument from ignorance.
who knows if it will take 35 years for us to slap our heads and say "oh, shit. these GMO carrots make us shoot lasers out of our eyes, and the potatoes make us crack addicts".
the point is that GMO technology is very young and not that well studied. my only political position on them so far is that i want all GMO food labeled so that consumers may make informed decisions. otherwise, the jury is still out.
well lets just put aside the appeal to emotion wrapped in argument from ignorance "maybe it will take 35 years for us to slap our heads and say "oh, shit. these GMO carrots make us shoot lasers out of our eyes, and the potatoes make us crack addicts" stance
and lets even put aside the gmo part because it does not matter how the food came into being it is the end result (the offspring/ grain) that is what we're really talking about
now we've put all that aside what have we got?
a novel food source and how might we best go about seeing if its safe to eat?
well the first thing they did was analyse it's content for toxins, nutrient content, or any other baddies that it might contain
you then have data which you can easily compare to say a parent lineage see how they match up together
oh look they've matched now what step do you take?
well you could feed both groups to test animals and see compare the 2 of them for toxins, nutrition growth etc and see what the difference is
well as the feedstock being given to the animals is the same guess what you get the same results between the animal groups
looks like theres evidence that this novel food group is safe
this novel food source has now had more testing than any other new food source and that includes novel naturally bred crosses
the people who are against GMO as an ideology have again and again tried to find dangerous results while studying GMO and the only way they can do it is with cherry picking results or downright shoddy experimentation
the argument that maybe just maybe in 35 years we'll all die a horrible death from GMO is an argument from ignorance and its an argument against the the data we have at hand
but for the ideologues none of that matters because "monsanto = pure evil" in their eyes even tho they cannot even give a realistic reason why its true