Why Do Asian-Americans Increasingly Lean Left?

According to exit polls, Obama won the demographic by 47 points. Razib Khan's explanation:

In short, it’s religion. Barry Kosmin has documented that between 1990 and 2010 Asian Americans have become far less Christian, on average. Meanwhile, the Republican party has become far more Christian in terms of its identity. Do you really require more than two sentences to infer from this what the outcome will be in terms of how Asian Americans will vote?