This is only for people who believe the Bible to be God's word.
The word "welcome" on a sign is not on there without qualification. For example, the sign outside a hot dog restaurant might read "all welcome," however that doesn't mean that criminals can come in and do as they please. It also doesn't mean that non criminals with bad tempers can come in and snap at the waitress or yell at other customers, etc. What it does mean is, "Come in and we will do you good."
The same is true with the church; for the sign does say "welcome" and everyone is invited to come and learn what God would have them to do (Acts 9:5–6). The reason this is being said is because many visit church and get angry when they learn that they have to stop doing something. They will protest "the sign said welcome and nothing about ceasing doing this or that!" To which we must reply, "coming to the house of God is a growing and learning experience. You add things to your life and cast away others, for being welcome isn't a green light to remain in sin, after you have been shown the truth," (John 8:31–32; Luke 13:3; Ephesians 4:17–32; John 12:48; Romans 6:12–23; 2 Corinthians 7:2; 1 Corinthians 6:18; 1 Timothy 6:10; 2 Thessalonians 3:10).
Hope to hear from you or see you at the services.