Theatre of political absurd: how to cut a thing into halves?

This article in Haaretz (authored by Yossi Sarid) comes with the following statement:  "The right wing has been in power for 35 years, with short intervals, but the left keeps running our lives from its fortified strongholds - the justice system, the media, academia."

Rational point of view:
Perhaps, there is too much of a scientist in me, but this made me laugh no less that the recent article about the "anti-witchcraft unit" in the Saudi Arabia. Indeed, how do you define left and right? The physically reasonable way is to cut the thing in the middle (center), which in politics would mean cutting between the two major parties, in the case of Israel between Likud (right) and Kadima (left). All the other movements than can be ranked according to their distance from the center.

If we adopt such a definition, it is easy to see that, contrary to the statement quoted above, left-wing governments spent significant time in power in the last 35 years.

Radical point of view:
It is unfortunately more often than not that people use a different definition of right and left: rather than compare their position to the existing spectrum of the opinions, they make an assumption that their position is the balanced one, and classify all other points of view in respect to theirs. Although this is a legitimate procedure, it naturally produces very subjective results, which look absurd in the eyes of the majority. In particular, a person, who objectively belongs to the extremely left part of a political spectrum, will see everyone else as right-wing and consequently come up with a ridiculous statement, which provoked this post.

The moment of truth comes when an intelligent person finds that majority of people hold the views that are significantly to the right (or left) of his/hers. In this case a liberal person adjusts his/her position or at least accepts that his/her views are rather extreme. However, more often people choose to insist that their views are the only correct ones, and try to force these views on everybody else. This has nothing to do with being liberal, but rather reflects communist/fascist tendencies. (Note: I use here the terms "communist" and "fascist" in general sense - as the terms for non-liberal/intolerant ideologies in the left and right respectively.)