Imo, the most effective way to spread the message of salvation on an individual level is through influence. If people don't like us, they will not accept our influence.
I also believe this on a more global level. As a collective, if we act holier than thou, judgemental, unaccepting, try to force our views on others politically, judge their right to choose their own religious and moral path, and otherwise act in ways that gives the world reason to hate us, that's on us as a collective. There are a couple of reasons we will be persecuted. One is because of the shameful way [collective] Christians treat non-believers and the other is the world's "genuine" discrimination against us because of our faith. The latter is not dependent on the former.