From Wikipedia:

Forced conversion

A forced conversion is the religious conversion or acceptance of a philosophy against the will of the subject, often with the threatened consequence of earthly penalties or harm. These consequences range from job loss and social isolation to incarceration, torture or death.

Forced conversions have been common throughout history, usually as part of a political policy to consolidate power under a conqueror.  An expanding empire, an official religion, unity.  The Hasmoneans forced those they subjugated to convert to Judaism .  With the Muslims driven out of Spain, Ferdinand and Isabella forced conversion onto the Jews and Muslims of their newly re-Christianized land, eventually giving the order in 1492 for those that did not convert to leave the country.  The task of keeping an eye on the converts to make sure they didn't relapse fell to one Torquemada, who was very good at his job and made the Spanish government very rich with confiscated property and the sale of Jews into slavery.

In the New World, the population pressed westward, and as it overcame the Native Americans, many thought the best approach would be assimilation.  Boarding schools were established, and throughout the late 1800s and early 1900s children spent years being indoctrinated into a new religion and culture, forbidden to practice their own.

What is it that hath been? the same thing that shall be. What is it that hath been done? the same that shall be done.   Ecclesiastes 1:9, Douay-RheimsVersion

Nothing is new under the sun.  

The re-election of Obama solidifies Obamacare.  And within those thousands of pages is a mandate for the forced religious conversion of millions of people.  The Catholic Church is the most visible face of that forced conversion, but many others - Jews, Muslims, Evangelicals - are facing the same choice as others have faced in the centuries before.  Change your religion, or suffer the consequences.  It's an attempt at forced conversion no less than that imposed by Charlemagne, Ferdinand and Isabella, or the Carlisle Indian Industrial School.  Those who are so enthusiastic about making the Catholics abandon their principles, to place their eternal souls in jeopardy,  may not have inherited the physical lines of Ferdinand and Isabella, but they are heirs to their age-old philosophy.