Rediculous Sensitivity in Immigration

A Japanese friend was stopped in London's airport and questioned for 3 hours, before boarding a flight to America. He was stopped at immirgration again. His belongings were searched thoroughly, questioned again and again. His documents were all copied by the officers. His friend, who went to pick him up, were questioned again and again, including questions such as "Is this person mentally OK?", "Is he always rebellious to his parents?". The questions were repeated too.
All the fuss was because he has stayed in Syria for 6 months, and had traveled in countries around Syria. He went through all the pains also because his English was not good enough to tackle all the difficult questions. The harder he tried to cooperate, the more trouble he dragged him self into. Isn't everything too sensitive? Who's there to protect his human right? For what reason is he worth the humilations, the tortures? The happiest person should be the supposed terrorists, live or not. Their bare announcement will cause so many people so much pain, especially so many innocent people ("Airport Security and Al-Qaeda's American Victory" tells the same theory). Maybe American government will argue that it is for protection of even more innocent U.S. citizens, or foreign travelers. Hope they can justify the huge sacrifice in Iraq, to prove that they have protected somebody with the death roll and the tax money.
Talking about language, one can read this report "Man questioned and misses flight for speaking Tamil". This man happened to speak Tamil at the boarding gate, and then questioned until he saw his flight off. His conclusion was "that he would not speak in a foreign language on his cell phone at an airport in the future." Come on, this is not even about freedom of speech. The "foreign language" was not even arabic! Neither this guy Iraqi like the poor guy in "American Air Passenger Regrets Having Iraqi Men Questioned".
Justice and human right are always relative and conditional.