How do you even know what a democrat or republican is?

the commonality is they are all PEOPLE

... the difference is their OPINIONS  on  issues of    human WELL BEING

Their called parties or "factions".

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"... It is from within, among yourselves - from cupidity, from corruption, from disappointed ambition and inordinate thirst for power - that factions will be formed and liberty endangered ... " -- Andrew Jackson.

By their political philosophy they hold, Conservatism or Liberalism, generally.

I looked up the diffetence between the two

Easy,,,,, Republicans think, and Democrats feel.

Democrats feel the government is the answer,

Republicans think the government is the problem.

Democrats trust big government,

Republicans trust big business.

Democrats feel, it is ok to kill an innocent fetus, and let a convicted murderer live.

Republicans think it is ok to kill a convicted murderer, and let an innocent fetus live.

Democrats feel the answer to any problem is to raise taxes.

Republicans think the answer to any problem is to cut taxes.

Democrats hate the rich,

Republicans want to be rich.

Democrats used to favor the 1st Amendment

Republicans favor the 2nd Amendment

Democrats hate guns,

Republicans like guns.

Democrats feel global warming is more of a threat then terrorism.

Republicans think terrorism is more of a threat then global warming.

Democrats feel the USA was occupying Iraq,

Republicans think the USA was liberating Iraq.

Generally self identification, or in the case of many Republicans the amount of lies they believe.

They are the two major political parties in the US.

Here is another way to tell.

A Democrat is a Communist. A Republican is a patriotic American 

Between two big children crying at each other? God damn that's difficult.