Sorry, the Senate isn't crazy, nor are it's 100 members. Who is crazy is those who vote them in, time after time, after time.
Look, Kennedy, Kerry, Collins, Feinstien, Boxer, Snowe, Chaffee, Durbin, Biden, Reid and the rest didn't jsut walk in and say, "Hey dude, I'm here seat me." No, the good folk of their stae sent them by majority vote.
So, wanna get really upset at the one(s) responsibile for the current membership of the senate? Look in the mirror.
I can look in the mirror and proudly say that I didn't send either of the morons my state sent to the Senate. I voted for the other guy, and encouraged everybody I knew to do the same. But in a liberal state like Hawaii - it isn't any surprise either.