I'll try for an actual answer to your question, but I'm fairly confident it's not going to be easy to come to a consensus on this site.1 Without examples of what was flagged, I can't really comment though about the specific things that you flagged so I think I have to keep it pretty general.
One particular hurdle I think we face as a community is that the moderators here are a bit more constrained than on other sites in the network. On Skeptics the boundary conditions between what is acceptable and unacceptable are much clearer. Here is the first sentence from our Help Center Tour:
Politics Stack Exchange is a question and answer site for people interested in governments, policies, and political processes.
The scope of this community is incredibly broad, a large number of topics are affected by governments and their policies so are fair game to ask questions about. Someone even convinced me once that questions about media companies and their funding are explicitly on-topic. Additionally, "political processes" itself is quite vague and can span a wide range of topics (see for example the roberts-rules-of-order tag, which isn't necessarily about government political processes at all).
My point is that in order to balance the large range of viewpoints on a large range of topics, moderators are presented with a bit of a conundrum2. Any action they take to remove comments (or not) is easily seen as motivated by political bias. There's plenty of regular contributors who already make waves now and again about how the entire site is biased one way or the other, so I can understand from the moderators' point of view that it may be easier to wait until the dust settles and then just go in behind after everyone has moved on to clean up the mess. It's not always an option if things get completely out of control I'm sure, but for borderline cases it may just represent the path of least resistance.3 They're already donating their time for us, and many times have to do double work to defend their actions here on meta regardless of what action they take. This is important for a website that purports to be about "governments and politics," since perceived political bias of the moderators is a surefire way to detract from the quality of contributions of the community as well as the relevance of the site as a whole.
Moderators just so happen to also be individuals and may have individual viewpoints on what constitutes "rudeness". My personal suggestion would be to just accept all flags sent in and delete everything everywhere all the time. That way everyone will be happy, right?4
1 - I'm ready to be proven wrong
2 - Heavy is the head that wears the crown
3 - Complaining complainers are going to complain anyway
4 - Merry Christmas