I cried when Carter left office, I was 12. I watched my 16 year old niece cry her eyes out for Obama. Why so many tears for bad presidents?

I believe it is because their reaction to Trump being their President has been more akin to mass hysteria. Although no legitimate group is contesting the validity of the election results. The stupid brain dead liberal idiots are protesting, some violent, and have caused massive property damage, snarled traffic, and involved at least one shooting (armed with a Tec-9). Agitators have stoked rage and panic with fake “hate” incidents. Democrats are lashing out at senior party leaders. Pro-Clinton college students have collapsed into anguish, unable to handle their academic responsibilities. High school students have walked out of school in mass. People have taken to social media to openly call for Trump’s assassination and the assault of his wife, and a college lecturer talked about shooting white people. In one particularly disturbing incident, a mother brutally shamed her 7-year-old son in an online video for voting for Trump in a mock election at his elementary school, insisting he was no longer welcome at home. Stupid brain dead liberal idiots have gone completely crazy because of Trump's win!

https://www.youtube.com/watch?v=jeZ1vMc6CNQ

It's so easy to deceive children.

Lack of experience and lack of education.