1)
Why does it say "Ki"?
1.
Radak: This shows that He is its refuge, for they came to fight against it in war of Gog and Magog
2)
What is the meaning of "ha'Melachim No'adu"?
1.
Rashi: They came to fight against it in war of Gog and Magog.
3)
Why does it say "Yachdav"?
1.
Rashi: They were together for war.
2.
Malbim: They came together in boats on the Tarshish sea.