Watching the Veracity Scythe getting closer, Jacob's decision crystallized in an instant, 'This is way out of my league since I can't kill it… I can't restrain it…then I'll just remove it!'
Jacob wasn't delusional enough to believe he still had a fighting chance to restrain or kill Whiteness at this point, nor did he believe he could pay the price of wishing to restrict a Higher Law God like Whiteness.
Furthermore, Jacob wasn't expecting Immortika to take action because the price was simply too high to even consider, and neither the Cursed Book seemed to be interested in helping him.
That's why he decided to directly expel Whiteness from the Infinite Space. He didn't even think about just removing himself and trapping Whiteness inside because it would be like leaving a wolf behind in a henhouse.
Not to mention the Infinite Space was his safe haven to hide from enemies like Immortal Nimrod and Destin Saint. That's why he can't entrap Whiteness inside.
