It may not be the glyphosate causing cancers as much as the surfactants and other ingredients that are used to make that jug of Roundup.
It's not only GMO plants that it's used on either. Many crops like wheat, legumes and lentils etc are sprayed with Roundup near the end of the crop cycle to hasten ripening so it's in many foods that you wouldn't suspect it to be in.
I'm surrounded by farm fields that that crap and all sorts of other harmful chemicals are sprayed on with the overspray often wafting over my small acreage. It took years of bitching to get the farmer that grows right beside us to be careful about the way the wind is blowing when he sprays. Across the road the field is owned by a different farmer that employs aerial spraying that often blows our way tho.
They couldn't even farm here without chemical fertilizers and multiple sprays as the thin topsoil was worn out within a few years of clearing the boreal forest and farming on the land. The natural micro-fauna in the soil is long since dead so nothing will grow without chemical help.
Mon$atan and others like Cargill are evil corporations and even the farmers I've talked with here admit they were sold a bill of goods when they were first coerced into GMO farming.
Now that Mon$atan has been bought by Bayer we can expect much more of the same. The Nazis that started Bayer sure as hell aren't looking out for our health.
Russia banned GMO years ago and the EU just fought for a ban on glyphosate but due to extensive lobbying by Mon$atan and their ilk ended up with an 18 month moratorium then the battle will have to fought all over again.