I understand your intention of helping a user. But there are some cases which we have to consider.
That was posted as an answer.
This is the main reason in deleting the post. The post which you are referring is a series of questions posted as answer. On discussion forums, there are no questions and answers. There are threads. In Stack exchange, there are no threads. Just Q&A. Such answers are considered as low quality answers and will be deleted. There is a auto-comment in the low quality review queues asking the user not to post a question in the answer fields. Deletion of low quality answers is a part of moderation.
Most parts of the post is giving out personal details.
There are many personal details in the question having them in the post may make it a personal advice question which is off topic for site. This is the site policy. If they are removed and asked as a question, it would become on-topic.
There are many questions asked under it.
Even if it is asked as a question, it would become a too-broad question.
Mods- please undelete this user's post to at least allow us to respond to their query and apprise them of site rules.
The deletion is according to the rules of stack exchange. So, I think there should be no problem in keeping it deleted. There is also a comment under the post which says to post it as a separate question but there was no question on the main. The OP's last seen is 09:45:47 and the post was deleted at 10:27. so, he could have replied or returned if we wanted the answer desperately and he was distressed. So, it is clear that they doesn't even know that their post was deleted. The probability of unregistered users coming back is very less.
Allowing questions in the answers is a bad practice and not suitable for SE format.
Now, coming of general way of treating, I don't think we are benevolent towards the new users. 99% of the times, the first comment they face is
Welcome to Hinduism Stackexchange.
Personal advice questions are off-topic on the site. We don't want that questions and the probably users who ask off-topic questions. So, it doesn't effect the site's popularity or traffic.
I don't think any users are harsh or rude towards new users. We always welcome new users and their useful contribution. Every user here was a new user at a point of time.