Dems are obsessed with stopping 3rd parties which is why less people buy their "democracy" stuff. I've never seen any other political party feel entitled to people's votes.
Nader is a convenient scapegoat in 2000 rather than everyone else who is actually at fault for Gore's (not-)loss.
Al Gore had 5 other chances to win besides Florida. He could have won NH, MO, NV, OH, and his home state of Tennessee. The fact that he couldn't carry any of these plus having places like Oregon closer than 0.5% shows that his campaign did not deserve to win.