Let's break your comment into parts.
Keshav I don't like your brackets. And you are very much non authority
to me in Shiva related works. You don't need to keep burden of
authentication. Let it be left to me alone. Btw, yes he might not
literally laugh. :)
Keshav I don't like your brackets.-- This portion is not rude.
- And you are very much non authority
to me in Shiva related works. --- This might look as a personal and as a somewhat aggressive comment. So, let it stay deleted.
You don't need to keep burden of
authentication. Let it be left to me alone --- This portion also is not rude to me. Taking into account the comment which you were replying to.
Btw, yes he might not literally laugh. :) -- And obviously this is not rude at all.
So, ideally, instead of deleting the whole comment, the comment should have been kept after editing the "rude" portions out of it.
The deletion of the whole comment was not the right thing done.
Also, in such situations, i guess, a lot depends on the moderator's discretion. One mod deleted it but any other might not have.
But you also made some mistakes.
One should not react to each such comments by a posting question in return. One should ignore such comments completely which are not adding any value to the post.
Let's see the comment you replied to.
I think what the Kalabhairavashtakam (which isn't considered an
authentic work of Adi Shankaracharya) is saying is that Kala
Bhairava's laugh is powerful enough to destroy everything in the
Universe, not that he actually uses his laugh for this purpose.
This whole comment is relevant to the post except the part which is in the brackets. That part was not asking for clarification. Was not about something that you wanted to know in your question. So, it is not adding any value to the post.
Thus, your 2nd mistake was to flag it as "rude". It was not rude but was "no longer needed". At least, the part in the brackets was exactly that. So, flag it properly now and try to get that part deleted.
Actually, the core topic here, and which is about adding just unwanted passages like " this text is interpolated/not authentic" in posts/comments to demean some other sects' beliefs or for any other reasons, have already been criticised and discussed very well here.
So the sad thing is, people who were doing it, inspite of being criticised, are still doing the same even now.
And I don't really know who can stop them if not the moderators?