You are either with us, or against us

In political communication, the phrase "you are either with us, or against us" and similar variations are used to depict situations as being polarized and to force witnesses, bystanders, or others unaligned with some form of pre-existing conflict to either become allies of the speaking party or lose favor. The implied consequence of not joining the team effort is to be deemed an enemy. An example is the statement of the former US President George W. Bush, who said after 9/11 at the launch of his anti-terrorism campaign in the form "Every nation, in every region, now has a decision to make. Either you are with us, or you are with the terrorists."
Background.
The statement generally is a descriptive statement identifying the beliefs of the speakers, and thus state a basic assumption, not a logical conclusion. It may also be interpreted as a speech act. Sometimes it is interpreted as a splitting or a false dilemma, which is an informal fallacy.
Some see the statement as a way of persuading others to choose sides in a conflict which does not allow the position of neutrality. Only when there are no alternatives like a middle ground does the phrase hold validity as a logical conclusion. The phrases are a form of argumentation.