-----> jinns have the capability of crossing dimensions, hence entering into the "human world"
-----> jinns have the capability of on-taking various forms and shapes, such as that of snakes or other animals, including the human shape
Now, keeping the above in mind, jinns can apparently make themselves selectively visible; hence it's possible that one person might see a jinn but not the other. However, the crossing of dimensions is forbidden, and we are forbidden from communicating with jinns.
But why do they cross dimensions, why is it neccesary ?
many years ago, I was of the thought that it might be some sinfull ppl, who could se them, and ppl who prays, and are on the path, they couldn't.
When my father was 13 - 14 years old, he was on his way home from some agricultural land, where he was studying. the maghrib azaan was just finished.
He met a lady jinn (churail) which chased him about 25 meters, but stopped cuz my father luckely ran on the agricultural land, which was given water.
Well he was at that time still a child, so he hadn't commited any sinfull crime, how come he could see the jinn without any incidence ?