There’s a lot to disagree with in that sentiment, _as you are applying it_.
First off, no human is a dog, the inherent attribute of being made on God’s image ensures this.
Secondly, Jesus’s “mission statement” was “to seek and save that which was lost.”
Third, the goal of every Christian is to become like Christ.
Thus, every Christian has a “standing order” to seek and save (the great commission is further, explicit proof).
Mark 4:4-8
King James Version (KJV)
4 And it came to pass, as he sowed, some fell by the way side, and the fowls of the air came and devoured it up.
5 And some fell on stony ground, where it had not much earth; and immediately it sprang up, because it had no depth of earth:
6 But when the sun was up, it was scorched; and because it had no root, it withered away.
7 And some fell among thorns, and the thorns grew up, and choked it, and it yielded no fruit.
8 And other fell on good ground, and did yield fruit that sprang up and increased; and brought forth, some thirty, and some sixty, and some an hundred.
I’ve sown seeds but what I’m saying is the obama voters are the rocky ground. The seed did not take root. Rocky ground is never going to produce a healthy, abundant crop.