What exactly was bothering the Greeks about Judaism?

What is at the core of doing מצות? Does understanding a מצוה weaken, or strengthen, one's connection to Hashem?

We explore the perspective of the רמב"ם regarding מצות, and then the perspective of חסידות - uncovering that the Greeks had a problem, not (only) with illogical מצות, but with the Jewish approach of entirely disregarding logic.