Ach, away wie ye.
Pragmatism is a long part of human history: the Greek philosophers were so, as were men like David Hume. Nonsense to say its a leftist idea.
I am a pragmatist on some issues, and have never been nor will ever be of the left. At ‘worst’, I may lean towards a centrist or libertarian bent on a few issues. But I remain conservative on most. Centre right or right.
Pragmatism is the all excuser. Go along to get along, no bigger reason.
Pragmatism, if “realpolitik” and its forebears is meant, led to every war ever fought. The ideologue will always beat down the pragmatist, whether the ideology is good or ill.