You can "crossbreed" red foxes & arctic foxes

This is wrong, they can crossbread in real life.

http://www.macroevolution.net/arctic-fox-red-fox-hybrids.html

https://retrieverman.net/2011/05/26/arctic-foxred-fox-hybrids/

First of all, macroevolution is not a legit site. It even had a page for a cow-dog hybrid which certainly doesn't exist.

Retrieverman has pictures of hybrids which have been created by artificial insemination. They have not naturally crossbred in the wild.

This seems to be the most accurate source:

https://livingwithfoxes.weebly.com/hybrid-fox-color-mutations.html

I think the hybrids in the retrieverman site might not actually even be real red fox / arctic fox hybrids, but instead hybrids with a completely another fox

Maybe they are enchanted foxes.

Pretty sure this is WAI because this is basically the same as saying that a brown sheep shouldn't breed with a white sheep

No it's not. They are different species and this never happens in the wild. They are natural enemies.

All sheeps in minecraft are the same species, with just different colored wools.

Given that dyed wool color is hereditary, that all animals are hermaphrodites, and that you can breed a brown panda from black and white ones... I think it's safe to say that Minecraft isn't too concerned about real-world biology. 

Maybe not the biology, but at least the behavior

I posted this comment on a reddit post:

''Mojang tries to make animals accurate as possible to IRL as possible, and that's why they avoid adding some mobs because they fear they misrepresent them in-game. Like sharks for example.

They even went as far as to not make foxes tamable, and instead made it so that only their babies are tamed. Just like it works irl.''

So, even if you think they should be breedable, they shouldn't be able due to the fact that Red Foxes hunt and eat Arctic Foxes

Where as the different pandas, or sheep etc. aren't enemies with each other in the wild

first mojang said this is the most realistic game so little kids who play minecraft java edition will think this is posable exept for me and im not litle