yes, it is necessary!

1. if we dislike any thing which prophet (peace be upon him) made halaal or haraam, we must remember that it is frm Allah not himself.

2. if we dislike the way of living of prophet (peace be upon him), remember it was due to his (pbuh) extreme humbleness and humility towards Allah.

3. on Day of Judgment, when we will be sweating due to our sins and all prophets will deny to ask Allah to start the jugdment, all the eyes will be set on Prophet Muhammed (peace be upon him). then only most of us will realise the greatness of Prophet over mankind and in the eyes of Allah