I've enjoyed poetry in novels. I liked the poems in The Hobbit, for example. I see nothing wrong with this, and if it's relevant and not boring, I won't skip it.
The issue is, what's important? The words themselves, or their effect on the other characters?
There's a scene in "Watership Down" where a rabbit recites poetry. The poetry is good enough, and of course, you're aware that it was probably better in the original language, but the point is how the others react to it :
"As he began to speak, he seemed to grow less and less aware of his audience and continually turned his head, as though listening to some sound, audible only to himself, from the entrance tunnel behind him. But there was an arresting fascination in his voice, like the movement of wind and light on a meadow, and as it's rhythm entered into its hearers the whole burrow became silent. "
And then the reaction of Fiver, the highly sensitive seer, is also described - "at one and the same time he seemed to accept every word and yet to be stricken with fear."
These reactions are the real point, not the poem itself. The inclusion of the poem probably does not make much difference one way or the other - except that in this case, if it were left out, you might wonder what you had missed. As it is, its inclusion makes clear that Fiver is not reacting to an obvious controversy in the words - which seem harmless - but to something much more subtle and profound, which is completely lost on us, as it is on the other rabbits.
As ever, what serves the story?