What does عصبية mean?

Q: I am having difficulty understanding a hadeeth which I read in Muntakhab Ahaadeeth under the chapter 'Rights of a Muslim', hadeeth number 172. The narration of Fusailah Rahmatullahi Aleiha. Also could you explain the real meaning of العصبية to me.

عن فسيلة رحمها الله انها سمعت اباها يقول سألت رسول الله صلى الله عليه وسلم فقلت يا رسول الله امن العصبية ان يحب الرجل قومه قال لا ولكن من العصبية ان ينصر الرجل قومه على الظلم رواه احمد

Hadith query

Q: Rasulullah (Sallallahu alayhi wasallam) said: "If a woman eats sweet melon, she will give birth to a handsome and pretty child." Please can mufti saheb verify if this is authentic? Which type of Melon does this refer to?

Talaaq of a person who is not in his senses

Q: I have a question about divorce. My husband is a high blood pressure patient and nowadays he is suffering from facial paralysis and a heart problem as well. So when his BP shoots, he is not even in his senses. He pronounced divorce four times in that stream anger and high BP and when he found me weeping then he realised that he was out of senses and pronounced that word. I am very upset please guide me.

Irregular bleeding

Q: I have a question which I find difficult to explain. I do not know what colour I should consider as haidh?  If I have a discharge that is like pink in colour. Is it haidh? Also if I have this discharge (pinkish) at asr time on Monday and then it's clear and then again I have it on Tuesday at asr time and then it's clear and then only on Wednesday at asr time the discharge is red blood. When do I calculate the start of my haidh?