If I said (as a criticism of Christianity) "It's written in the Bible that homosexuality is a sin," would you assume I hate all Christians? Would you think I shouldn't say it? Would you think we should not talk about it in public?
So when I say, "It's written in the Koran that Muslims must fight non-Muslims until everyone on earth comes under the rule of Islamic law," why assume I hate all Muslims? Do you think I shouldn't say it? Do you think we should not talk about it in public? Is Islam in some special category of things that can't be talked about?
For more ideas about how to talk to people about Islam, check this out: Tools to Help You Educate Your Fellow Non-Muslims About Islam.