Honestly, I would just give them a pass to carry a ceremonial knife, if they could prove they were Sikhs and not someone pretending to be. But I guess that's why we can't have nice things and why the same rules have to apply to everyone. I think most reasonable people understand that they can't preserve every aspect of their personal beliefs or pride in a situation involving the safety of millions of people flying daily. Carrying a weapon is certainly a bit unusual as a pillar of faith, but there are plenty of others that could also be deemed antipathetic to the well functioning order of a modern society trying to move people safely from A to B. And the same way I would consider trained and licensed gun owners to be a relatively low threat and a rule-abiding group of citizens, that's how I would view Sikhs with their blades (or even more so). So if you're Amish, take a horse. If it's Shabbat, wait til Sunday. If you're the TSA and you want to be more efficient by discriminating, look at people who have no discrenable ideology, or those whose ideology actively conflicts with your mission of preventing attacks.

This is completely absurd and backwards. Violence on planes (at least, phsycial, weapon-assisted) is basically exclusively the purview of organized ideological groups, it's not like crime in the streets. While I'm not aware of any Sikh group who has ever attempted to hijack a plane, the extremely well established general pattern is exactly that extremist sincere believers in a religion or cause are the most dangerous people on a plain.

Sikh's carrying a knife, a bracelet, a comb, etc. has never bothered me in the slightest in all the decades I've known about this - the Khalistan movement in a particular location during a particular time aside, they're not exactly actual postcards for terrorism (despite what some might think when faced with people and turbans).

They always had a pass here in Australia for many years until things tightened up.

Not that I'm a fan, but in general Rules are Rules and making exceptions while fair in some senses will be unfair in others <shrug>.

Circling back to my initial comment- it is the case that there is an actual reason rather than a made up bit of bullshit, to reasonably suspect that a Sikh might be carrying a knife ... if they are they're almost certain to also have a comb .. so that's handy.