It's a multi-billion dollar contract of course they would want to build it
If the wall is going up anyway why wouldn't a Mexican company taxed in Mexico and employing Mexicans want to benefit instead of an American company?
It would actually be an L for Trump if a Mexican company is building it in this era of Making America Great Again and putting America first.
Damn breh, that's just as bad as Jews designing German weapons You gon' build a symbol of oppression to your own people