You clearly have not read the bible if you think it says that only.

> Thus saith the LORD of hosts, I remember that which Amalek did to Israel... Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.

Christianity and Christ are two separate things. The names of political affiliations rarely capture the actual goals of the policies. Conservatives are against preserving many things, and liberals are against allowing many things.