This "GESTAPO-like" treatment of crew (and pax) seems to be largely a "Western" thing.
CDG checkers are the rudest ones we (on our carrier) encounter. Sour-faced, ignorant power-pussies. Refuse to speak English, rather point, push and snarl. LHR crew screening is usually polite, nevertheless thorough. FRA so-so, depending who is on duty. The younger their staff, the more hassle crew gets. Taking off shoes, jackets, belts, watches, pins and name badges from shirts... the girls still "beep". Take off the underwire bra????
SIN, for example, provides sensible service with a smile. 3 am or 3 pm, doesn't matter. "Hello Captain, how was your rest? Had a nice time in Singapore?" A 30 second process.
Of course all this extra "security" bull...t, costs crew time. WE do get picked up from the hotels earlier and earlier, reducing rest time further and further.
"To ensure the AC will leave on time".
Companies don't (usually) care beacause they just adjust "rest" times.
Politicians and officials don't care because they probably get whisked through VIP channels.
We as crew are a soft target for the whims of "Security" personnell because we can't complain to anyone. They fill their quotas for feeling up people.
Incidently, WHY so often exactly those kind of people (thugs) working IN security, that you are trying to keep AWAY from sensitive areas or your home??? ;-)