It is not always easy to share our faith with others.
Most people are simply indifferent to what we believe. "Well that's OK for you, but not for me" they say.
Others are far less polite in their response. They mock us and ridicule us. They misrepresent us. They would take away all of our freedoms if it made them feel more comfortable about themselves.
There are others too who are blatantly hostile towards Christianity. Mention Christ, mention the cross, and they become passionately angry and defensive. I remember having a discussion with someone who told me she was a Christian, and we were having a friendly conversation about the church, about prayer, and the Christian way of life. But as soon as I started talking about Jesus, she did not want to continue the conversation.
Even Christians who are not living their lives for the Lord feel uncomfortable with us sharing our faith. I had a conversation some time ago with someone who mocked me for wanting to be serious about my faith.