Fasting on Ashura day reviewing the traditions and views of the jurists

As for the day of Ashura, there is a difference of opinion between the jurists; a group believes that fasting on this day is absolutely mustahab; others consider it as mustahab if it is intended for grief and grief; on the other hand, a group also quits fasting in this Day is recommended. Some people, in contrast to the view of the first group, have given it absolute disdain, above that group believes in its respect; and some also believe in disgust and evil, and it is a mischief, and it is only recommended that the believers do an hour after prayer The age of empowerment, now the question is what is the nature of these differences?
It seems that the narratives entered in this subject are of two different positions; the permissions and prohibition narratives, each of which are observing before and after the Karbala case, and because, on the one hand, the enemies of the Ahl al-Bayt on this day are fasting for their consolation. And on the other hand, it should be disheartened in this calamity, therefore, the promise of the death of Amasak, without the intention of fasting, seems to be stronger.