The difference is that the Liberals have taken this to extreme. The Arminian is somewhat more subtle.

"Very different is the idea which Scripture gives us, of the ever-blessed God, from that of those false gods worshipped by the heathens; and from that degrading representation of the true God, which Arminianism would palm upon mankind. "Our God [says this Psalm 115, verse the third] is in the heavens: He hath done whatsoever He hath pleased." This is not the Arminian idea of God: for our free-willers and our chance-mongers tell us, that God does not do whatsoever He pleases; that there are a great number of things, which God wishes to do, and tugs and strives to do, and yet cannot bring to pass:" (A.Toplady)

"The doctrines of Arminius can be traced back as far as the time of Clemens Alexandrinus, and seem to have been held by many of the fathers of the third and fourth centuries, having been diffused in the church through the corrupting influence of pagan philosophy. Pelagius and his followers, in the fifth century, were as decidedly opposed to Calvinism as Arminius was, though they deviated much further from sound doctrine than he did. The system of theology which has generally prevailed in the Church of Rome was substantially very much the same as that taught by Arminius, with this difference in favour of the Church of Rome, that the Council of Trent at least left the Romanists at liberty to profess, if they chose, a larger amount of scriptural truth, upon some important points than the Arminian creed..." (W.Cunningham)