I'm new to this configuration thing. How do I do it? It's not allowing me...

in the pushable entity blacklist. It doesn't allow me to apply :(

and what entities, villagers, sheep, cows and such

That gui looks like its from some tool like configured so if you want that fixed you would need to follow up with them. But you can still change this in configuration files directly where I am pretty sure I have note with format expected.

I don't understand what you are trying to blacklist where so I would need more context.

im also trying to add something to the blacklist for the torch. when i add the entity id for the minecolonies citizen to the configs blacklist it just crashes my game on launch.