My love for my kids is unconditional..they will always have a home....I'm their dad, and they are the most important "things" in my life.
God should be the most important thing in your life and if you loved your kids half as much you would know that standing firm in your love of Jesus is loving them.
Jesus was offensive. Most people were offended by him. The proof for John the Baptist that Jesus was the Christ was that the blind see, the lame walk and the majority are "offended" by Him (Mat. 11:2-19). As Jesus said, "Blessed is he who is not offended because of Me" (Mat. 11:6; Luke 7:23).
If your stance for Jesus offends them, so be it.
In Galilee, Jesus did not plead with his neighbors to understand Him when "they were offended at Him" (Mat. 13:57; Mark 6:3). If unbelievers are offended, so be it (cf. Luke 14:3-4; John 5:8-16). "Shake off the dust from your feet" (Mat. 10:14). But alas, that is no longer a Christian attitude it seems...
Without a correct interpretation and understanding of Christian doctrine I can't fault you for feeling this way about your kids because without it anything goes. However if you were a Christian as is Alan Keyes then this feeling would be in error.
The most important relationship should be the one with God, not with your kids and Keyes is following that dictum. If there's nothing your kids could ever do that would make you throw them out then either you have really good kids or you'd be willing to compromise what's right for what's wrong. I can't see any other option.