KIGALI, Rwanda—In a key speech on his visit to Rwanda, French President Emmanuel Macron said he recognizes that France bears a heavy responsibility for the 1994 genocide in the central African country. Macron solemnly detailed how France had failed the 800,000 victims of the genocide but he stopped short of an apology. France “was not an accomplice” in the genocide but ended up siding with Rwanda’s “genocidal regime” and bore an “overwhelming responsibility” in the slide toward the massacres, the French leader said, speaking Thursday at the genocide memorial in the capital, Kigali. “France has a role, a history, and a political responsibility in Rwanda. It has a duty: That of looking history in the face and recognizing the suffering that it inflicted on the Rwandan people by favoring silence over the examination of truth for too long,” Macron said. When the genocide started, “the international community took close to …