I wonder if arrogance and being a airline pilot go together. I fly one of those put puts you trained in o so long ago.
You spoke as if the pilot landing the jet in a serious cross wind was doing it wrong. Who was being arrogant, pointing out that you were wrong to criticize what you know little about?
Surely you know that many of those tail draggers parked next to you are flown by airline pilots, right? Just because I have flown an airliner for thirty years does not mean I have left small aircraft behind.
As for “crab vs slip” there is no difference in large or small aircraft in the basic aerodynamics. There are not two method as you suggest. There is one: touch down in a slip. You need to touch down with the wheels aligned to the direction of travel once on the ground. That requires a slip, EVERY time. The difference in a small aircraft is you can slip early, all the way on final if you want. In a swept wing, or FBW aircraft that is dangerous, so instead the slip is done in ground effect, moments before touch down.
In the ORD landing, there is a camera parallax tha makes look worse, but the pilot flying did not have sufficient aileron to complete the slip, so ihe touched down in a crabbed slip, which is acceptable if you want to avoid catching a wingtip.