Jennifer Rubin is one of the Washington Post's stable of conservatives. In her case, "conservative" is defined as unprincipled, globalist, moderate Republican. Those in the Tea Parties movement - who have a highly skewed vision of conservatism to begin with - tend to regard her as a "RINO" in the David Brooks mold, but not due to her globalist, anti-nationalist stance.
Rubin is basically just a token: she's not as bright as Brooks or some other conservative pundits and just scrapes by.