Fate is also lolicon bait. Some of the most popular characters from the Fate series are the loli characters that are often the favorite subject of Rule 34 artists from what I've heard. I'm not a fan of the Fate series myself but I've heard a lot of wild stuff about it (I've heard there is even an official lesbian anime OVA featuring some of the loli Fate characters based on what people told me). For crying out loud there's also the character Astolfo where he is a popular character with gay and trans people due to him being a crossdresser (the only reason why I know about this is because of the memes I see everywhere). Who the fuck is Welper even kidding with this? No one.
As for 4chan, it's clear that Welper is new to the Internet because there is an unspoken rule of the Internet and it's that you don't fuck with 4chan, ever.
I'll list some accomplishments 4chan managed to achieve in their entire existence on the Internet with their legendary lulz that Kiwi Farms has yet to top.
4chan has done the following:
1. They were one of the first to bring Japanese pop culture to have an Internet presence long before it went mainstream.
2. They gave birth to the 'Pool's Closed' meme back when they used to fuck with Habbo Hotel when that was relevant.
3. They discovered Chris-Chan and immortalized him long before Kiwi Farms even existed.
4. They've sent Oprah Winfrey the now infamous 'Over 9000 Penises' letter where she read the letter out loud on live television and the letter claimed that Over 9000 pedophiles are coming for kids when this was actually a troll and a perfect example of Poe's Law (which states that when a parody or joke seems so absurd that people may mistake a parody or joke for the real thing, think of those satire articles from The Onion).
5. They were responsible for 'The Fappening' where an anon managed to obtain never before seen nudes of various Hollywood celebrities and leaked them on 4chan.
6. Rage Comics, Wojaks and Soyjaks, Pepe the Frog, and Rickrolling all came from 4chan (I don't see Kiwi Farms making their own original memes).
7. Internet lore like the SCP Foundation (an online science fiction and supernatural series) originated from 4chan.
8. One time Tumblr declared war on 4chan and 4chan won (if Tumblr failed then Kiwi Farms has no chance either).
9. They made My Little Pony: Friendship is Magic into a media sensation back in the 2010's for the lulz.
10. They collected intel for the Russian military where they gave this intel to Russia and afterwards Putin ordered a missile strike on an ISIS base in Syria (this actually happened, 4chan helped both America and Russia take out ISIS during the peak of the Syrian Civil War).
11. They memed Donald Trump into the presidency during 2015 through 2016.
12. They played the world's largest game of 'Capture the Flag' with Shia LeBeouf using the constellations in the night sky and airplane chemtrails in the daytime.
13. They once psyoped American news media by tricking them into thinking the OK gesture (a common hand gesture used to show satisfaction with something) is a "white supremacist" symbol (4chan was trying to prove a point that news media will fall for any bullshit and it worked because at the time news media unironically believed the OK hand gesture was a white supremacist dog whistle).
14. Most recently they gave birth to the Backrooms meme which is a nod to back when the 4chan anons were creating the SCP Foundation lore.
Even Jersh knows better than to mess with 4chan.
4chan has made such a huge impact on the Internet, not even Kiwi Farms has come close. If Welper wants to declare war on 4chan then they're free to do so. They should know that this will not end well for Kiwis.
4chan is like a Lovecraftian god (the great old ones) that no one should ever fuck with.