Forced Movement rules specify the square must be one the creature would enter by walking. So through the Monster's allies, sure, through your allies, nope.Can you pull/push/slide an enemy through your allies? And can you pull/push/slide an ally through enemies?
Can you pull/push/slide an enemy through your allies? And can you pull/push/slide an ally through enemies?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.