They can't be that smart if they're heading into the US now. Concerns about ICE hunting down "furiners" should be enough to give them pause; Especially those that are part of a visible minority.
I'm a visible minority who went from the GTA to Boston, everything is fine. People with this attitude are mostly fear mongering. No one I know has been harassed by ICE. Not saying they aren't doing terrible stuff, but the average tech worker is just fine in the US.