I would interpret the thumbs up as OK. Some variations:
In Iraq they will insult your moustache.
'Curse be upon your moustache'
Funnily, as kids in New Zealand we used to yell 'poo to your letterbox' as an insult. I haven't heard that one since other than in items about the past (left NZ at age 6).
The V sign (as we have discussed some months back) has two ways of doing it and two distinct meanings. With the inside of the fingers facing you and your fingers slightly bent, it is a pommie way of saying 'get f***ed' and derives from when about 2000 british longbowmen slaughtered 7000 Frenchmen at Agincourt in the 15th century. After that the French when capturing English longbowmen would cut off those 2 fingers (string pulling ones) so when a Brit showed those two fingers it was his way of saying 'you are done for (or f***ed)'.
The other V sign is when the fingers are held stiff and the backs of them are to you (the V signee). This came from Winston Churchill and meant V for Victory. In Japan people (esp the young) use the sign a lot to mean 'Peace and Happiness'.
I don't have any explanation for the origin of the middle finger salute. I am not sure where it eminated but I know its intent <grin>.
As for the thumb sign. In England it was always used as a sign of solidarity, in Australia, as a "she'll be right mate". i.e. Everything is going OK.
Now then, we have the 2 fingers (the pointing fingers) crossed, we take that to mean bad or evil or 'the devil'.
The V signs and thumbs up I saw in the news reports struck me as very positive signs of support.
Cheers
Doug Marker
Spectres from our past: Beware the future when your children & theirs come after you for what you may have been willing to condone today - dsm 2003
Motivational: When performing activities, ask yourself if the person you most want to be would do, or say, it - dsm 2003