Blue is barely a struggle to heft up, even though he does tense out of reflex. The quality of Finn's concern mingles with the unease in Blue's own heart, and it's confusing in that moment to consider that focus is on him, not on the situation at-large.

Finn's not a liar. He's confident in what words he'd said - that despite Blue's concern, there could be safety here. He's--

No. Blue's eye refocuses on the closest thing he can find with his head bowed as it is. No, but...if you touch me, I may see...more than you wish to share. From your heart.

Finn may be like him, but he isn't. Which means he may just as well fear him as any other human does out of impulse.