How do hiring managers decide to hire someone who was fired from their last job?

People are getting fired for no fault of their own management is bullying and being completely dishonest now days

Many have been fired for one reason or another in their careers, it's not as though if a person has been fired once they should never be hired to work anywhere again. Depends on the person, their experience, the reasons they give for being let go & extenuating circumstances.

Based on their fit

you absolutely give them a fair chance to explain the reasons behind the situation it could be anything from a female being sexually harassed and being in dispute at the time and still working on finding out if she can do anything about it it can be numerous things I don't automatically state that the employee is at fault because they were fired managers fire people all the time sometimes just because they're jealous of them and afraid they may be taking their job so no I would definitely have every bit of the explanation at hand and I would investigate and research it thoroughly before I made any decision you cannot convince somebody just from something like that you have to research

Review of references, understanding the culture of the last job they came from.

Hello, There are MANY reasons why this could happen. For one, unless it's the same company and position, its a DIFFERENT position. Just because your last position/company/employees were not a good fit, does not mean it will be the same at the new company. Sometimes its more about the personalitity and fitting in than the skills. Skills can be taught.....people skills cant always be.... It could also have been an attendance issue due to extenuating circumstances. You can't always judge the future from the past.... But... It can be a great "Caution" sign... Hope this helps some!

The decision to fire is usually made by one person with the support of HR through established policies. I would interview the person to see if they understood the policies and try to understand the reason they did not abide by them. The answer to that question would tell me whether the person truly understood why they were fired and whether they could change from that experience.

I don't know, more than likely on a case by case basis.