It sounds to me like KTM needs to take a good, hard look at its management and personnel. Or some higher authority needs to do it for them.
This horrible story was all over the news, alongside another one about a KTM employee who yelled abuse at a disabled passenger before kicking the man's wheelchair.
Either the company is hiring ill-behaved employees, or the working conditions are so bad that the employees feel the need to take out their frustrations on those who can't defend themselves. Either way, KTM looks like a company with big problems.
(And don't even get me started on the train service...
)