After being on earth about 6 decades, I personally cannot call ANY politician in the world a liar.
I hope I can explain the reason properly in English
Politics is the oldest art known by men, hence it has evolved more than any other art in our life.
Politics is the art of controlling the masses with a smile and continuous hope.
Politics, since always, has needed gifted and well-trained persons to play its very important roles before the masses.
Let us jump to the present international Politics which is evolved incredibly
Politics could be seen now as a long non-stop series (broadcasted worldwide).
The top producers and directors in the world of this great international series don't need to show up (as it is the case for movies). And they have all the necessary means (power and money) to hire the politicians that are needed on almost over the world (at least in the important regions). Please note that, here, 'hiring a politician' means convincing someone, in a way or another, to play faithfully his given role that should serve at the end the plans of the Politics' Elite producers.
How these actors are replaced or even fired (sometimes making of them, scapegoats) also depends on where they play their roles. For example, some of them could be replaced or re-hired by great ceremonies of so-called free elections (as in America). Some others are instructed to play the kings or princes as in Saudi Arabia.
In brief, how could I call an actor, named politician, a liar?
A good actor has to tell his audience interesting stories as they are written on his given scripts.
Also, he could be instructed to play the Good, the Bad or the Ugly because all these roles are needed to make a good movie... hence good politics
