Fine. We can put it on the burns, whatever. [He may just be mad with himself that he didn't think to put it on those first?] Even if they're not demons out there, they act like demons. And demons can do powerful things.

[Hilariously, he's pretty patient with feeding her or handing her a coconut to drink out of... mostly because it's a little embarrassing having to do this since it ruins his reputation.] Demons get stronger in my world when they have pieces of the Jewel that Kagome broke. The complete Jewel gives demons great power.

So maybe those two gave these "demons" some kind of Jewel to make them so powerful. But without our own powers, we can't do anything about it. Did you even kill it?