Why is it that abortion seems to be the only moral issue that really animates Christians?

Free market economics is a moral issue, too
Envying my neighbor’s success
and advocating that the government
take his property by force
is a moral issue, too
Bearing false witness against a Supreme Court nominee
is a moral issue, too
An absence of gratitude for one’s blessings
is a moral issue, too
Progressive taxation is a moral issue, too
Putting my neighbor’s life and property at risk
by failing to prosecute crime
is a moral issue, too
Inciting violence and the destruction
of my neighbor’s property
is a moral issue, too
Depriving my neighbor of his God-given freedom
is a moral issue, too
Calling what is good, evil, and what is evil, good,
is a moral issue, too