They were pretty heavily into human sacrifice, however.
So are we. There were probably about 2 million Mayans at the peak of their empire. Since 1973 we've torn to bits over 58 million babies in the womb here in the U.S. At least the Mayans believed they were appeasing their gods. We do it because we don't want the inconvenience of using cheap and easily available birth control.
The Mayans were specialists in torture just for the sheer fun of it, more so than any other culture in Mexico.