Is kangaroo a foolish animal ?

I'm not sure where you got that story from, but if you've ever met a kangaroo, you could check it out for yourself & know that they are really intelligent. They are self-reliant & a healthy roo can out-pace & kick-to-kill any of its predators. That is why there's more than twice as many of them here as there are people. As with most native & some domestic animals, the light & sound of an oncoming vehicle really mess with a kangaroo's senses. It drives them berserk & they don't believe in roads nor can they reason that most vehicles travelling along them cannot also travel overland at the same speed. Thank you for your interest in our native animals.

Dear friend, May be God created it like that so that some know the meaning of word foolish well. So that many can give an example while pointing out in the list of animals, like elephant is for large, dog for pets, tiger to wild, so on. Still I hope kangaroos has a bag too to carry while roaming around. Moreover Kangaroos are foolish but sometimes there are also cunning animals like wolf. I hope it would be better if all wild animals like lion, tiger, cheetahs etc too become foolish.

"Stupidity" is not a measurable thing, because it changes. For example, a little baby can be more clever then another, but it is not more clever then an adult. Same thing goes for kangaroos. A kangaroo might be more intelligent then a fly, but it might not be more intelligent then a kangaroo.