No. He was not a liberation theologian, far from it, however some of the things he says certainly latches on to the same type of issues that liberation theologians have attempted to address.
Must not the spirit of the Compassionate One be poured out over our whole government administration? We are not a pagan but a Christian nation, a nation that has to take account of the human heart, also it its dread and nameless suffering… The Antirevolutionary party accordingly asks that a new spirit may control our public administration; that our legislation may show a heart and officialdom some sympathy for suffering citizens; that powerless labor may be protected from coolly calculating capital; and that even the poorest citizen may count of the prospect of swift and sound justice. – “Maranatha,” May 12, 1891
He was definitely not a liberationist but he sure was concerned about the “little people” and making sure that God’s justice was present in society, especially in the area of economics.