The second link you posted was from 1994 and was actually Montefiore hospital, not Einstein. It's been 17 years... I'd bet that most of the administration is different now.
As for the first link, I would hope (and assume) that it was confined to one or two people in the administration/faculty. If any sort of anti-gay bias was widespread, we'd be hearing about it/there would be a lot of backlash from the students. Speaking to currents students, there aren't any issues that they're aware of.
If we're going to mention issues, GW was put on probation in 2008, when they didn't monitor students' time with patients, there was a lack of study space, and students complained of mistreatment. Probation was lifted just last year, and I would assume (just like with Einstein) that things have been changed to prevent future issues.