Sejanus.Aelianus
Veteran
And the BBC, ever the trendy lefties refer to the losing side as "republicans" rather than communists.
The losing side were the legitimately elected Republican government of Spain, consisting of a wide coalition ranging from Liberals to Communists. The winning side were an illegal insurrection that included military officers and politicians discredited as corrupt, which was the original cause of the election. The losers were, I agree, supported by the Soviet Union. The winners were supported by Nazi Germany.
While I would seldom question the trendiness nor the leftism of the BBC, I rather think the charge is unfounded in this case.