Let's say you're taken-in as a suspect, because you happened to be in the area where a politically motivated attack took place. The FBI looks at your internet history, and finds; "Until career politicians are eliminated, this country will never begin to be fixed." If this comment isn't the epitome of ambiguity, nothing is. An intelligent person would have said; Until career politicians are voted out of office, this country will never begin to heal. Whether or not this is what you meant, it is open to interpretation. i.e. Ambiguous.
Your mouth will get you into more trouble than anything. The sooner you realize this, the safer you will be. If history has proved anything, it is that authoritarians are not to be trifled with! Making politically ambiguous statements is tantamount to tinkering with incantations... The danger lies in not knowing what you're doing. In our current context; it simply means that you should be mindful of what you say, and to whom you say it. Under authoritarian rule, all are judged, politically.