It's a yellow square that says Willkommen / Welcome. In one case I have seen that additional text was written into the square with a black (removable?) marker.
This website explains it like this:
A yellow welcome panel painted beside each of the passenger boarding
doors is now visible on each aircraft. The mark is a flat yellow
rectangle, with the ...
NSDAP was the elected ruling party in Germany from 1933 to 1945 (only the first part of it elected though); thus Lufthansa was given government money, not "Nazi"-money. During this time, they made the Swastika the flag of Germany. American Airlines sport the American flag all over their tail, and I'm sure they (at some point) have received government money ...
Look up the idea of a national airline, a flag carrier, and drop your attitude that for whatever reason they should have been banned from operating because they had been such.
Aeroflot carried the flag of the USSR proudly, the USSR killed more people than Nazi Germany ever did. Totally irrelevant. They're their country's flag carrier, so they show the flag.
I found this forum discussion from a few years ago, which stated:
LH Express was their brand name for domestic services for some years in the mid 90s. I'm not sure when the LH Express name disappeared, but they definitely were not promoting the Express name in 1997 any more. So the aircraft you saw was probably just not repainted yet. LH used to operate ...
This page for pilot applications shows a 165cm number.
I didn't translate to see what it's for
4 pilot jobs listed, only the first 3 show the 165cm.