The US denied entry to Palestinian leader Omar Barghouti, cofounder of the Boycott, Divestment, Sanctions movement.

"It's an immigration matter" conveys zero information — denying someone entry is always an "immigration matter". So that response was a non-answer pretending to be something more.

I do not advocate the BDS movement — rather, I support a boycott of Israel's colonies in Palestinian territory, which was founded by Gush Shalom.

However, it is despicable for the US to exclude advocates of a nonviolent political cause. Pretending that's not what's happening makes it a little more despicable.