It is natural for NORMAL people to help others in situations of disaster, acute need or distress. Basic courtesy is enough to help an elderly person or a sick one to carry their luggage, etc.
But packaging this into extended goal or philosophy of "love others" or "sacrifice for others" is very dangerous. Progressive left and religious right share the same morality of sacrifice.
What it takes is rational morality. If you want to have good relationship with your neighbors or enjoy selfish feeling of your own altruism, help them provided you have time. If you do not care, help those whom you love (relatives, close friends) or spend more time on things you love to do (job, hobby, etc.)
I suggest to read Ayn Rand books to see the limitations of Rothbardian Libertarians.
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