That says:

"Airplane hijackings have occurred since the early days of flight. ...Pre-1929, 1929–1957, 1958–1979, 1980–2000, and 2001–present."

"...Between 1958 and 1967, there were approximately 40 hijackings worldwide..According to the FAA, in the 1960s, there were 100 attempts of hijackings involving U.S. aircraft: 77 successful and 23 unsuccessful....

"..In a five-year period (1968–1972) the world experienced 326 hijack attempts, or one every 5.6 days.."

And your conclusion is "Palestinian" movement (that you wrote between quotes)...invented airplane hijacking?

Looks like the first one was a Hungarian in 1919.

Would you really be worried if someone said or wrote that near you in any context?

Short of them holding a weapon, this is baffling.

HN is generally absolutist when it comes to ‘freedom of speech’, and I don’t agree with having no limits, but in this instance it’s some overly sensitive overreaching BS.