Right versus left

The Tablet carried a fine article on the Polish Catholic radio station, Radio Maria.
Why is it that most Catholic institutions that become popular are usually extremely conservative - even 'zany' in their pronouncements?
It seems always to end up with people having the perception that if you are Catholic then you are right-wing to the point of being 'zany'.
Categorising people into right and left does not help. But there is a some sort of link between 'far right-wing' people and a form of 'pseudo zealotry' that is most worrying. Is the same phenomenon on the left wing? Not sure. Maybe 'liberation theology' in South America is an example.
Maybe this will explain what I am trying to say. If a 'right-wing' priest gets up and talks nonsense it seems he will not get into any trouble with authority. But if a 'left-wing' man preaches nonsense he will be set on immediately.
I have seen some 'right-wing' publications in Ireland that border on libelling people and yet they seem to be untouchable.