Oh no I am not assuming that, I don't give a shit what side you are on, wanting a in your words "Mob Howling for blood" is fucking braindead.
They are showing support for him because he is the first major political figure in 3 decades who doesn't hate them and actually attempts to improve their lives in a tangible way and thus they are doing something tangible. Taking time out of their day to go and cheer for the man and say "Hey you have had our backs for 4 years, so we will have yours on election day." and it is probably one of the few moments in Donald Trump's day where he gets a relief from the constant barrage of pure negativity that the man gets from everywhere else.
If you are such a miserable asshole that you can't understand wanting to cheer for the first President in decades who meets the very fucking low god damn bar of "Doesn't hate your guts." that is on you.