Not everyone in life has a perfect relationship with their parents. We have differences that range from personal opinions, choices in partners to what time our curfews should be when we're younger. I feel we only ever 'get' our parents and those decisions they made when we ourselves become parents too.
But no matter how many differences we might have, or how many times we lock horns with one another or scream and shout, it is inate within each mother and father to defend their child to the death. There is no fiercer protection than that of your parents when they know you're in trouble, hurt or upset.
Even if you feel you're oblivious to them, or perhaps the last time you both spoke was in a heated moment, you are never far from their thoughts or protection.