There is an infinite amount of negative events occurring in the world. Being a compassionate person does not mean you need to make yourself aware, read every news article on and be in a constant state of reaction to every piece of negativity out there. That's exhausting and unsustainable. If you deplete yourself you'll be useless to others, more likely to be bitter and a greater contributor to the very negativity you initially felt compelled to react to. It is natural that based on your own upbringing, stage in life, experiences and a bunch of other variables that you will care about some issues significantly more than others. Others will not resonate as well with issues you care about too! This is normal. Do good in your day to day, improve your capacity to help others through self improvement and then help them in a sustainable manner where you do not harm your ability to help others in the future.