To answer the OP, I do not believe that there is ever a need to sacrifice anything for God.
You cannot give your life for God. He does not wish you to commit suicide even at the hands of others.
If you were a Jew and the Nazi's lined you up and asked you to denounce your faith or you will be shot, what do you do?
You denounce your faith. You save your life. Your words do not change your ideals. You were forced.
Do you think God will think you are weak? You are surviving. The wrong is not placed upon you it is placed upon the Nazi soldiers. Do you think that God does not know what they did?
Does burning the American flag change anything about our country? It's dyed cloth!
What is meant by sacrificing yourself for others is selfishness.
When placed in a situation where a being only knows itself, is unsure about the motivation of others, and has no feeling of connection to God, what will it do?
Will it live for itself, wasting, littering, taking, and using more than it's share at the expense of others?
Or will it live for others, doing good although there is no return, picking up trash although it is not on it's own property, giving extra food to those who have not yet eaten?
Are you in service toward your own life or are you in service toward others?