1)
How did He abandon Mishkan Shilo?
1.
Radak: He abandoned the Aron (let Pelishtim capture it).
2)
Why does it say "Ohel Shiken ba'Adam"?
1.
Radak: This is like it says "v'Shachanti b'Soch Bnei Yisrael" (Shemos 29:45). It says "Ohel", for in Shilo the Aron was under curtains.
2.
Malbim: The primary Mishkan (residence) of His Ohel was in man, if man is proper for this. Since they were not proper, He abandoned the Mishkan.
