According to Craig Blaising, who cites two monographs to support his claim, supersessionism was the mainstream position throughout most church history. Cf. See Stephen G. Wilson, ed., Anti-Judaism in Early Christianity, vol. 2, Separation and Polemic (Studies in Christianity and Judaism 2; Waterloo, ON: Wilfrid Laurier University Press, 1986)); R. Kendall Soulen, The God of Israel and Christian Theology (Minneapolis: Fortress, 1996). Michael J. Vlach seems to agree.
I haven’t investigated the issue myself, so I don’t have a personal opinion on the historical question. But assuming that supersessionism was the mainstream position throughout most church history, that raises the question of whether Mother Church is getting forgetful in her dotage: