With the gold domes of the Cathedral of Christ the Savior glittering just across the Moscow River, members of three Russian Orthodox groups that espouse a fervent blend of nationalism and religiosity set fire on Wednesday to a poster of the feminist punk band Pussy Riot and also put a match to a poster of the pop star Madonna.

‘‘We’re going to rip them up and burn them,’’ said Leonid Simonovich-Nikshich, the leader of one group, the Union of Orthodox Banner Bearers. ‘‘Like in the Middle Ages.’’

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