Neil LaBute burst upon the New York theater scene 20 years ago with Bash, a trio of one-act plays. It is a form he frequently returns to, and for the fourth year in a row he is represented by an evening of three one-acts under the umbrella title, LaBute New Theater Festival. Anyone familiar with the playwright’s work knows that his plays often attempt to shock—or at the very least agitate—his audiences with provocative, you-can’t-say-that-in-public pronouncements and confessions. Seemingly ordinary and recognizable individuals give voice to amoral and dark thoughts, and a successful LaBute play prompts a fair amount of uncomfortable laughter and occasional squirming in one’s seat. Fans of LaBute will be happy to know that the latest offerings contain their share of unease, and they unsettle with needling provocations around politics, race, and personal relationships.