Actually, it's the Democratic Socialist Party, thanks to O'Reilly. Let's make sure the name sticks.
If you don't know why you should be a Republican after you read it I only have one comment. Ignorance can be cured, stupidity is forever.
The sentiments in that party platform are beautifully stated, but the party leadership has yet to put it into practice, or even attempt to do so. If you can't see that they are being typical hypocritical politicians, and merely promising what we wish to hear without any intent to follow-up on the ideals, then I have a similar comment to return to you.
The cornerstone of the Republican philosophy is the belief that each person is responsible for their own place in our society. (farm subsidies, housing downpayments for minorities, aid to almost every nation on earth, etc.) Individuals are encouraged by the Republican Party to work to secure the benefits of society for themselves, their families and for those who are unable to care for themselves. (yet they are hindered from doing so by income taxes, estate taxes, capital gains taxes, etc.) Democrats are more willing to subordinate individual rights to the assumed needs of the group. They assume that society collectively is responsible for each of its members. They place less emphasis on individual enterprise and initiative." "Republicans believe that government should be limnited to doing for people those things which they cannot do for themselves. (Leaving the door open for all sorts of extra-Constitutional vote-buying Socialistic give-aways) The right to determine individual destiny should lie in the hands of the individual.) (Yet they support gun-control laws, seatbelt laws, drug laws, and a million regulations "for our own safety", even when we are the only ones affected) Similarly, Republicans believe governmental power and resources should be kept close to the people through their state and community leaders, rather than cetralized in distant big government." (Yet we see ZERO encouragement for this at the GOP's national level in the decade-plus since Reagan)
In short, there is no difference in the PRODUCT of the two parties, no matter what their stated philosophies may be.