Jesus was sometimes not very subtle. His lack of diplomacy with hypocrisy was founded in the heart of God. In fact, Jesus is very hard on those who pretend to make God first in their lives and then do what they want. He'll even use the "h" (hypocrite) word when it is needed!
God cannot stand it when we play like we're devoted to his will and then do what we like, want, or feel more comfortable doing. Only his will is binding. Only his will matters. Our preferences are simply that—our own opinions. They are generally neutral, unless we start replacing God's will with our preferences. It's easy to honor God with words, but he wants obedience so our character can be conformed to his own. To do less is to do wrong.