Yeah, but, 'I saw a couple of elves with the Resistance guys' does not necessarily equal 'the elven kingdom has sent an elite team to infiltrate and free the city'. If Belkar had ever failed to cut the kidneys out of a witness or two and word of his presence got back to Redcloak, I'm sure he's not going to immediately assume the closest halfling town is out to get his precious Gobbotopia.
And yes, I am aware I'm over-thinking this.