This is pretty sickening. I'd say the same thing if the other party were victimized. The sole intent of this is to allow terrorism and harassment of individuals. As a society we all need to disavow political violence, regardless of ideology. Democracy dies when people stop voting and start terrorizing.
"I'd say the same thing if the other party were victimized" we see a qualification before the statement. Always a good sign :).
It appears they have also posted Democrat/Independent details, too: latest release (Part II) includes Senators Warren and Sanders among others.
Ironically this is not all that confidential. Anyone who works in an office on Capitol Hill has access to personal contact information for every single member of Congress. When I worked on the hill, I had a little book that listed the personal home address, telephone number, unpublished email, and classified email for every single member of Congress. Including information about their spouse and kids.