In the etymology you've posted, 'fun' is described as "to cheat, hoax" as early as the 1680s. 'Funny' is then attested at a later time as a modifier with a slightly modified sense emphasizing the humorous aspect of something like a hoax or joke. A particular 'cheat', 'trick', or 'hoax' could seem more like a good-natured laugh or more like a mean-spirited attack. You see this spectrum of meanings in the various definitions.
At it's core, 'funny' means 'unusual', 'unexpected', or 'odd'. All the definitions you've included in your questions are just different, more specific ways in which it is used to mean this.
Humorous
Things which are completely expected, known, and ordinary are generally not funny. Most humor involves misdirection and surprise, so it fits in with the ideas of unusual and unexpected, i.e. 'odd'.
Strange
I hope this is clear.
Dishonest
Things or people which are dishonest are not what they're expected or believed to be. Some uses of 'funny' in this sense include "funny money" and "funny business".
Unfriendly
I'm not familiar with this usage, but I'm not from the UK. The closest thing I can think of is "you're acting funny" when someone seems to be offended. This is said because the person is not acting in their usual manner, but instead in an offended manner. I suppose this could be extended to general unfriendliness fairly easily.
Ill
The important thing to note here is that 'funny' can mean "slightly ill". Feeling funny is between feeling healthy and feeling sick. You don't feel like you normally do, but you don't feel awful either. A simple stomach ache probably doesn't go beyond feeling funny, but the flu takes you all the way to sick.
A synonym for this sense of 'funny' would be 'quesy'.
Crazy
Crazy things are so unexpected and unusual that we often can't figure out why they would be that way.
Best Answer
I actually don't think we ever say many of people, at least in standard English. many of the people is possible, but not many of people. So, we say either that or just many people.