If you can't interpret his post try asking an LLM.

10: Fun fact! Language carries implications. It is possible to say things about people without using the literal direct words that would typically be used to say the same things.

In this instance, the comment "get in line behind slashdot" is being used to imply that the other commenter is something like out of date, unoriginal, or participating in a hivemind. These further imply that the other writer is immature enough to resort to insults, and in their doing so either unintelligent or unmotivated to create their own insult.

Both commenters are engaging in ad hominem and perhaps poisoning the pot, but given that this is not a logical debate the behavior is not so much of a fallacy as just potentially abrassive to certain audiences. The first was abrasive to the second, and the second was abrasive enough to create a comment on hypocrisy.

Then, you asked your question and I said "goto 10"