Anxiety doesn't always begin "naturally". Sometimes it is the end result of years of abuse, whether it's mental/emotional or physical. Be gentle with people that have anxiety issues, you never know what their story is.
and then i notice how a group of them act and get all paranoid so i test it out the next day to see how they'll react and they usually are normal and even friendlier than i though im like UGH WHY BRAIN
Just what are anxiety disorders anyway? Anxiety disorders are the commonest psychiatric illnesses globally. And while there is no cure for anxiety disorders, there are very effective treatments available with a good evidence base.