There are more- and less-effective ways to communicate. I agree that turning people off is a bad outcome. I don't necessarily recommend using those words head-on; rather, I try to summon facts, history, law, etc. in order to bring more knowledge to the table. Similarly, I try to help people see things from other people's perspectives, or try to help them complete their initial thoughts to their logical (and often absurd) conclusions so that they might see things differently.
Sometimes it works; but more often than not, it doesn't. People can be really freaking stubborn. They really don't like being proved wrong.
That's what actually turn people off joining collectivist causes; the judgmental rhetoric, moral absolutism and holier-than-thou attitude.