How common is it that airports used for larger commercial traffic airliners lack ILS?

It is not very common for large Airports not to have ILS if they want to have more large commercial airplanes to land there. Airports with deficient landing aids are often blacklisted. So if the Airport wants to attract more tourists coming in big numbers, then they have to upgrade their landing facilities.

3. How sensitive are airports on weather conditions with and without ILS. (I know this is a bit non-stringent question, but it could be interesting to hear some aspects on this, at least in qualitative terms)?

I am not very clear as to what you meant by sensitive in reference to Airports caused by weather. Do you mean that the reputation of a particular Airport would be affected if it were not equipped with an ILS for bad weather landing? As I have mentioned above, an Airport with poor landing aids (without an ILS at least) would be blacklisted as unsafe in certain circumstances.

That would be sensitive and ruin its reputation. I hope that is answer you are looking for. 4.

Would ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.