well it seems we expect such things happen that's probably why we show them what to expect
Could have literally hundreds of other, more probable reasons (including raising preparedness against terrorist attacks, hostage takings, and so on).
or in 2013 didn't people of Nirooyeh-Havaee district in Tehran attacked a school
People vandalizing a school building, essentially shattering a few windows and pouring some paint on the walls because of a disagreement with the municipality about the location of the school, but with no intention to harm anyone let alone children... What superb example! How comparable to a US school shooting... not!
or two years ago in south of Tehran a boy attacked a girl school because he heard the girl he loved want to marry another person and wanted to kidnap the girl
Nope, he didn't attack the school. He illegally entered the premises and tried to pull the girl he was in love with out of the building, that's all. There was no intention of bodily harm let alone murder against anyone. Very romantic, worthy of a soap opera but not of a crime film. Specious analogy for worlds apart from any US school shooting, once again.
by the way didn't some people attacked a girl school in Sanandaj 2-3 years ago in midst of the unrest there
In the midst of unrest? And this is comparable with school shootings under perfectly ordinary circumstances?
and well attack on Tehran university in 1378 and 1388.
1) We're talking about schools, frequented by minors. Not universities where everyone happens to be of adult age. But I understand that when one finds so little, one might be tempted to toss in a couple of off topic cases to give it at least a semblance of credibility.
2) Political event, entirely different category of use of force. Unrelated to school shootings, really.
or in 1395 two student attacked school employees with knife in roodsar ,
or in 1396 a student attacked teachers in his highschool in Tehran with knife ? .......
So you searched the web thoroughly, and it turns out only two such acts appear to have been committed in Iran over the past few decades. Of course nobody died because well, the Iranian government is not as irresponsible as the American one and won't let children access firearms - although even then it stands to debate whether the perpetrators would have made use of them, i.e. whether their goal was really to kill. So if this indeed is your flawless "demonstration" that the security situation at Iranian schools is supposedly unenviable, then "congrats"!
In conclusion, two isolated instances of proper school violence in Iran involving the use of weapons - and against adults not minors, over a period of some twenty years or so. Versus countless mass shootings in the USA that took the lives of and maimed literally hundreds of children during the same period.
Now if western-leaning Iranian liberals wish to interpret this as meaning that the security of Iranian schools is even remotely as awful as that of American ones, I'll gladly invite them to pack their bags, settle in their beloved America and allow their offspring to visit schools there because these afterall are "not that much more unsafe", are they!
Thank you, case closed.