I blame the Iranian government on this. They should wall off he pakistani border and set up automated machine gun towers to shoot dead any creature that attempts to cross over. I mean if this brotherhood is at the price of so many Iranian lives, then I say piss on it!
What's the point of discussing this in a civilized manner and trying to have a dialog with them, when they refuse to accept they have a responsibility here and point the finger right back at us. If they don't understand, then they don't understand. Fcuk it! If they don't care about us because we are mostly Shias, or they don't like Persians or they're in the Saudi camp or whatever, that's fine. Let's move on and readjust our posture and treat them as hostile state on our borders. It's not like Iran doesn't know how to treat those.
The Iranian government's indifference in this matter has been criminally negligent. How long is this gonna go on for? And don't give me that crap about the terrain being difficult. If Chinese could build thousands of kilometers of walls 2000 years ago, we could build a much smaller one today...