Everything is a poison with the right dosage Here is a fun chart you can use to see what I mean. Even water is poisonous if you drink enough of it.
fructose in no more poisonous than glucose. No study has shown fructose to be dangerous when eaten in normal healthy diet. It is poisonous but only in the sense that water is poisonous if you drink to much of it.
And you should reread your own source the article concludes it is NOT more poisonous than glucose. It also concluded that the paper that claimed so was erroneous because it used animals with different metabolic pathways and the differences were not significant in any case. Nor is it possible to eat a diet high in fructose without it also being high in glucose (see above study) so it would not be an issue even IF Dr. Lustig was right about the lipid metabolism.
News media loves to focus on single isolated studies with odd conclusions which is basically the worst way to represent science, wrong or erroneous things get published all the time and get quickly found out but the media tend to latch on to the former and never report the latter.
Processed sugar is bad for you for completely different reasons, basically the same reasons donuts and bacon are bad for you, they are empty calories, it is just that Americans (and a few others) eat way way more refined sugar than the other two, absurd levels of it, for comparison it is as if you were eating large amounts of bacon for every meal levels of absurd. There is also the aspect of diabetes which has to do with how much and how often we eat sugar not an issue with the sugar itself. (if we instead ate half a pound of bacon grease every day that would be the thing causing problems.)