EDIT: no, I don't sympathize with nazis (neither I sympathize with those who call everyone nazi when they're losing an argument ;)
Defed is cheaper than consulting a lawyer.
I think they're mainly quick to defederate because they don't want to burn out their mods.
Conflict and drama means lots of work for them so I can see it being an easy choice. Personally I'm happy my instance isn't too trigger happy with it
Forreal your instance might be the one I'm most confused by, you've got like a 50/50 split of chill people who are okay with conversation and people who drop slurs and reply to any attempt at engagement in memes and 
gotcha one-liners.
Not ITT, OP commenting on their own post. 3 day old account posting just to stir up shit. Obvious plant is obvious
Many instances have shit like hexbear federated, but have explicit rules on the side saying "no tankie shit". make it make sense.
Are we talking about exploding heads or hexbear this time?
Yes. If they want to do that shit they can do it somewhere else. Hell, take it to Facebook.
Someone doesn't like the movies you like? Red button
Someone has questionable opinions on economic policies? Green button
Someone starts talking about how (((they))) own the banks and run the world? Blue button
Wow I got red and blue mixed up before this edit FUCK me
Go back to whichever 14 year old infested, fake communist, edgelord hideout you crawled out of.
Everyone in here but me seems to know which defeds this is about.