It could happen. But I suspect if Republicans tried they would lose at the ballot box in 2018.
I already said Republicans should look at any nomination Obama sends them. So you wont get an argument from me about their blanket refusal to even look at nominee. What I disagree with you about is calling the court dysfunctional. The court is functional with one justice missing. I also disagreed with you about Schumer. Schumer is a lying sack of shit. His statements were clear that any Bush nominee should not get considered. A supreme dying on the bench is not unusual.
I agree with you that what some Democrats have said then and now are totally different. (although not Biden, actually). The thing is that you can find members of any party that say stupid shit like this and there's a HUGE difference between one person saying it and actually doing it. For example, Democratic lawmakers said that we should impeach Bush, but that would be no defense in my opinion if Republicans actually tried to impeach Obama.