Ostracise

From a young age children learn to ostracise those who aren't like them.

You then moſt Noble Equivocations and Alluſions, whom Rhetorick would Oſtraciſe, ſeek Revenge for your Baniſhment; [...]

The inflexible advocate[s] of the people's rights, were either expelled the Senate Chamber, ostracised, or immolated on the reeking altars of patriotism, by the encrimsoned sword of slaughtering persecution.

Republics have been accused of being ungrateful. Aristides was ostracised for being called the Just, and Themistocles banished, after saving his country from desolation.

[T]he person who was ostracised was obliged to leave Athens within ten days after the sentence, and unless a vote of the people recalled him before the expiration of that time, to stay in exile for ten years.

[O]thers may wonder at the mawkish taste of a community which, instead of ostracising such a palpable charlatan at once, attended and praised all that he had to say!

The Athenian Hyperbolus, who had been ostracised some years before by the coalition of Nikias and Alkibiadês, together with their respective partisans—ostracised (as Thucydidês tells us) not from any fear of his power and over-ascendent influence, but from his bad character and from his being a disgrace to the city—and thus ostracised by an abuse of the institution—was now resident at Samos.

No party worthy of the name will submit, permanently, to any regime which ostracises its best men and selects the worst, which has become an epidemic condition of party politics, and may take off most of what is worth recognizing in the pride of our boasted institutions.

I long to be one with the birds and trees and with the green earth. The call comes to me from the air to sing, but, wretched creature that I am, I lecture—and by doing it, I ostracise myself from this great world of songs to which I was born.

A common practice by established parties in liberal democracies that often accompanies delegitimisation efforts is ostracising a challenger party. In this book's first chapter we have defined ostracising a party as systematically ruling out all political cooperation with that party [...].