Yes. If they believe the accusations, which it appears that they do, that should be enough to remove him from the team. No one is talking about throwing the kid in jail without a trial. It's not "ruining a kid" to temporarily stop him from playing a collegiate sport while the legal system sorts out the truth.
As others have said, players usually have each other's backs through thick and thin. Scanlan was the team's leading scorer. That his teammates don't want him around should tell you A LOT. No, that doesn't automatically mean the allegations are true, but it at least means they're credible.