Except the trolling part hiding in this post, I will go by few things here. Well, it will take as long as such threats and attempts are countered and depends on your strategy to sabotage it but the safety counters are more stronger when it comes to defend. In easy words, you have to put more than usual efforts to go offensive and defender is always at advantage being at home so it isn't the matter that how long to blow it up again but the thing is, can one do it and give it a try that too, after all the calculations and aftermath. Professionals have to calculate every possibility that how such action may end in more stronger reaction and they aren't novice in such decisions hence, it wouldn't be the matter when the time comes to repair.
Such supply modes are viewed as piece of cake on papers as well as offensive strategies but parties here, have already evaluated every possibility in-case of destruction of rail connection. There are many ways and methods that can keep the connection alive when push come to shove.
One should be impartial when it comes to others as well so by that definition, India occupied Kashmir hence, attack in such parts wouldn't counted as attack on any country. The said IoK territory is disputed and matter is on halt.
So the strategic and national level matters are certified through Media and are verified by TV Channels/Talk Shows. Let me tell, Media will always throw a bait for one to pick so it depends who fall for it and trust me we are not buying it at all. Also, remember that these media houses are private organizations funded by businessmen being backed by foreign forces, the masters and they agenda to carry on with a campaign which is called media warfare. We are sure how we are dealing into such matters and you have only picked those shows speaking as such propaganda and lies but there are golden moments attached to the same as well.