I have different view over this. I meant Brest is at the top, but they often fought against the weak teams. It's kinda different when they are gonna face Real Madrid. This pretty much the same situation like when Real Madrid fought Atalanta.
Real Madrid at the midtable, and Atalanta was topping the competition by winning all of ez games, yet they able to destroy Atalanta.
What's the difference then?
Real Madrid is on the verge of elimination, and they face Salzburg at home and Brest away. I share the same sentiment as you, I don't believe any of these clubs can stop them? No, they've found their grounds, and these are simple games with a decent possibility of qualifying for the R16.
Brest has done exceptionally well for themselves this season, their first appearance in the CL in a long time, and they have already exceeded expectations.