He convinced the mob not to stone the adulterer [John 8]...The followers of Nice Jesus love to quote the 'throw the first stone' verse...

Both verses are likely forgeries. They only appear in one manuscript that was written later than the other manuscripts we have that contain the book of John. The earlier manuscripts do not contain these verses. Research "Pericope adulterae" to find out more.

While we're often reminded that Jesus said 'live by the sword, die by the sword', we seem to ignore his other sword references. Like when he told his disciples to sell their cloaks and buy a sword [Luke 22].

The verse in Luke 22 precedes the event that caused Jesus to say 'live by the sword, die by the sword'. He wanted to use the swords as a lesson and to fulfill prophecy. He himself mentions the prophecy in Luke 22:37. The lesson was to not fight, because Christians have no need to fight, because their kingdom is not of this world.

Everything else this anon said is fine.