Belarus is not a great team by all means, but Luxembourg is a very small nation, and here they will have a hard time.
And this match they will have even more problems, because 17 (!!) of their players got food poisoning due to some bad spaghetti – thats atleast what the rumours says. Lxembourg does not have a huge width in their squad, so if their best players aint playing they are much weaker than they already are. This could be a very hard time for them, and even money for -1.5 is good for the home side.