Kakashi CAN warp a whole tailed beast (he didn't, but he can)

[ezequielosses]

In the las manga, we saw him warping a tentacle, he JUST warped a tentacle, he didn't warp a whole bijuu.

BUT

He was capable of dragging out of the other timension a whole bijuu.

It's the same thing to warp a bijuu from inside that from outside.

If he was capable of kamui-him OUT, he is capable of kamui-him IN.

Proove me with manga that warping things out is easier for kakashi than warping things in.

[History]

so why did they need the tentical?

[Expulso]

He DID warp the whole Bijuu...

[jiraiya lives]

the 8 tails was hiding in tentacle form so when kakashi warped him it turned into a surprise attack
the only reason he didnt warp the whole thing was because they were trying to make a surprise attack

[yondaime4]

the 8 tails was hiding in tentacle form so when kakashi warped him it turned into a surprise attack
the only reason he didnt warp the whole thing was because they were trying to make a surprise attack

i like this answer