If you find such comments so objectionable that they should be removed then I suggest you carry on flagging. There is no guarantee that a flag on one comment will be accepted, though.
It is possible for moderators to lock an answer to prevent further comments being added, but that also prevents votes being cast on it. Although locks can be (and usually are) temporary, lasting only long enough for the question to fall into relative obscurity, to use the measure in this case would be unusual.
Each of the more-or-less identical comments has been added by a different user.
However, while moderators do remove potentially-inflammatory comments which start a conversation which goes off course — as happened on this answer — this particular comment doesn't actually swear. For myself, I would prefer to let the latest comment stand. At least it's only a comment, and it does document a phrase which seems to be at least reasonably common — since three different users have added it. While it may not conform to the way you would refer to the good Lord, ELU is an academic site which provides and answers and documents the use of English. Such a comment does fit, and people are quite able to come to their own conclusion about whether they would use such a phrase. Or even form an opinion about those who do.
There should be no need to comment on such a comment though. If someone replies to the comment, that response is probably either "too chatty" or "not constructive".