The TL;DR version is that the Jedi, at least generally, respect laws and life. The Sith will do anything to get their way, including murdering people unnecessarily.
Let's address their actions with examples and counter-examples in the order you've chosen and incorporating your examples(I'll stick to the movies):
They both exert undue influence on the ruling classes, outside the democratic process.
The Jedi are seen in the prequel trilogy consulting with and advising senators Amidala and Palpatine. There is no indication that the Jedi forced these senators to submit to an audience, and in fact, we know that Palpatine was definitely a willing participant as he was using these audiences to influence events and Anakin. On the Dark Side, we see the Sith (again, Palpatine) manipulating the entire senate into abandoning the democratic process altogether to start his empire.
They are both full of themselves.
I won't contest this. :)
They are both dynastic, based on heredity: you are either born with the Force or you're out of luck, never to join the exclusive club. If anything, the Sith seem less dynastic.
Neither is dynastic in the traditional sense as this implies a family line (But as was stated previously above, the Jedi are a celibate order, which is about as far from establishing a dynasty as you can get). However, you're right that they do both require you to be Force sensitive to join. This is akin to a book club requiring you to read books to join.
The Jedi seem just as cavalier about shrugging off civilians deaths, whether collateral or intended. Anakin's slaughter of the sand people was shrugged off by almost everybody. Thousands of innocents died on the Death Stars and the new planet killer in Episode VII (whatever its called).
There is no indication that Anakin reported his slaughtering of the sand people to the rest of the Jedi order, from what I recall. Only Padme is told directly. Further, at this point Anakin has strayed drastically from the teachings of the Jedi, so counting him as a representative of theirs is specious at best. It's true that thousands died on the destruction of Empire death weapons, but:
- The Jedi did not plan or implement the destruction of these machines. The Jedi order was hunted down and killed (by the Sith) before the destruction of them. You could make the case that Luke and Obi-Wan were remnants of the Jedi involved in destroying the Death Star, but Luke never received training by the Jedi order prior to this event, and further:
- The Empire (run by the Sith) had just demonstrated they were casually and flippantly willing to slaughter billions with these weapons.
Further illustrations of the Sith disregard for life and the Jedis generally affirmative regard for life are not needed after that last one, but:
-When Jedi seniority is displeased with subordinates (Yoda to Qui-Gon, Qui-Gon to Obi-Wan, Obi-Wan to Anakin), they scold them and instruct them. When Sith are displeased (Vader to many poor Imperials, Kylo Ren to machinery everywhere), they destroy them.
-When Jedi enter a hostile scenario (Mace Windu approaching leaders of the Separatists on Geonosis, Mace Windu and others arresting Palpatine in his chambers), they attempt to arrest or otherwise end conflicts without violence. When Sith enter hostile scenarios (Kylo Ren on Jakku, Palpatine responding to his arrest), they murder people.