>refute this guy
If I wasn't so autistic, I'd tell you to do it yourself.
But for the first pic, he's right. Tolkien's elves were made in complete opposition to the standard fae folk/fair folk style of elf that was predominant in Anglo-Saxon and Celtic (more so Celtic) mythology of the time, of faeries and elves that'd abduct people, boggart them away and what not. Funnily enough because Tolkien's idea of elves as a sort of superior humanoid race of old got so popular, other authors like Pratchett when back to the originals in a sort of contradiction of mainstream. Of course the fact Tolkien's elves were thus old folk obsessed with the changing of the world and the passage of time, and the preservation of things, is not an indication of being badly written content.
Calling elves stupid isn't an argument. He'd need to say why. Dwarves lift some aspects, predominantly language, from Jews. Tolkien did this because the Hebrew sounding language would stand in opposition to the more Celtic/Finnish elven tongues.
And to say Middle-Earth was inspired by medieval Germany is hardly true. It was rather different things in different areas of middle-earth. Rohan was Anglo-Saxon with horses. The Shire was the countryside of England that a lot of 19th and early 20th century authors edified, Gondor was a sort of Roman esque civilization, and so on so forth.