Calvinism, Thomism, and the polemics of freewill theism

The God of Reformed theism is constantly impugned as a "moral monster," "worse than Hitler," "worse than Satan," &c. It makes God the "author of sin". Turns men into "robots" and "puppets". 

What's odd about this is the incessant attack on the morality of Calvinism, while Thomism gets a pass. Thomism is a very influential theological tradition that continues to have many devoted and outspoken adherents. Yet Thomism is just as "deterministic" as Calvinism. Why do freewill theists who chronically revile Calvinism ignore Thomism? Why the one-sided treatment? 

http://journal.rts.edu/article/aquinas-and-calvin-on-predestination-is-there-any-common-ground/