Why does it seem like the Democrats are more narrow minded than Republicans?

all democrats are racist, why else do you think they are in the party of slavery and Jim Crow?

Yes, it is just you.

The operative words there are "seem like".

“We don't see people as they are. We see people as we are.”
― Anaïs Nin

That's a meaningless generalization.

If democrats could get away with it they'd implement a totalitarian state

Democrats have gone full on Fascist. 

People see things the way they want to see things, and take individual cases and apply it broadly. Why are 90% of Republicans in Congress white non-Hispanic males? Why do the policies supported by Republicans disproportionately hurt people of color? Why are Republicans shouting about their own rights rather than the rights of the abused? The Democrats understand that the systems set up by the Republicans are racist and bigoted. Provide a few examples. Trump supporters are all one or more of: 1) Wealthy and want a lot more wealth, 2) Afraid to share control of the systems, 3) Too ignorant to know truth any more.
 Trump supporters are extremely narrow minded or empty minded.

Both sides can be narrow minded.

It is the people who can develop bi-partisan ideas who will be successful.

It's just you

Democrats and Republicans have different political views that tend to conflict with each other. Democrats want what's best for the country and so do Republicans.