When a party to get its way are willing to burn down the nation they intend to run
They are not fit to govern.
When a party is unwilling to listen to those whose life's work indicate we may be tearing apart the planet because the data says we have a major problem.
They are not fit to govern.
When a party promotes tearing apart a planet to fuel their greed
They are not fit to govern.
When the intention of a party is to profit only a tiny minority by giving them the keys and wealth of a nation.
They are not fit to govern.
When a party removes women's rights in the name of religion.
They are not fit to govern.
When a party calls others vile and disgusting just because of their sexuality.
They are not fit to govern.
When a party denigrates others on the grounds of race or nationality
They are not fit to govern.
When a party promotes one religion over all others.
They are not fit to govern.
When a party promotes torture.
They are not fit to govern.
When a party hates government
They are not fit to govern
When a party's only answer is fear an loathing.
They are not fit to govern.
When a party wants to roll over the constitution to suit their needs
They are not fit to govern.
The Republican Party promotes all of the above.
Hence: They are not fit to govern.