It may be, for example, that both are effects of a prior common cause. Causal arguments are often wishful thinking, where the speaker is seeking to prove their case, and hopes (as with other fallacies) that their causal assertion is not challenged.
Civic nationalism is a form of Nationalism that aims to accept all current residents of a nation whatever their race, religion or language. Many, though not all, civic nationalists are liberals.
A civic duty is an action required by law for a citizen to perform. One civic duty is to serve in the military if drafted by the United States. Because Ali refused to be drafted, he was arrested for not fulfilling his civic duty.