Tevruden kinda sees that Varaelian and himself aren’t that different and have been through a similar situation. (Also: Van puts Tev back together (Which is eaiser to deal with because apparently mortals get freaked out when you use ~scourge magic~ to re-attach limbs) and Tev kills people that would prevent him from doing that.)
Basically, they’re dorks.
Just look at them: