And I am curious that so many people concentrate on the few flip-flops done by Trump, but at the same time never mentions about those done by Hitlery.

I found some more of her qualifications:

https://en.wikipedia.org/wiki/Hillary_Rodham_cattle_futures_controversy
https://en.wikipedia.org/wiki/Whitewater_controversy
https://en.wikipedia.org/wiki/2012_Benghazi_attack

2008 she shames Obama
https://www.youtube.com/watch?v=7_X-RoRghAY

2016 she fucking loves him
https://www.youtube.com/watch?v=bmcLDECccyQ

She can't even figure out how to wipe a server
http://www.bloomberg.com/politics/articles/2015-09-22/fbi-said-to-recover-personal-e-mails-from-hillary-clinton-server

Hillary would be the worst possible scenario.