The Huguenots didn’t “infiltrate” France. They were French, Français de souche who were enlightened by the Reformation. Read a good history of the Reformation, then come back, minus your anti-Protestant bias and ignorance.
Second step they bite the hand of the government that was tolerant
Third step they destroyed Churches
Fourth step, they collaborated with the enemy of the state (a competing power)
They lost and got evicted -- that's what happens to those who are traitors to the nation.
However, that is besides the point, this was a historical article, not a religious one so please do not make it one
Historically speaking the Huguenots DID slap the hand of the government that had tolerated it, just as the Moslems do in France today
Historically speaking they did the attack the majority first and destroy Churches -- the first salvo so to speak
Historically speaking they did collaborate with the enemies of the nation and foment civil war
Do read up on the history of this time in France and the civil war that this caused. The Huguenots were one side of the civil war -- even worse, they collaborated with the ancienne enemy (England). They were hence traitors to the nation as well as fomenters of civil war.
They lost and got massacred, that's what happened in all times right up to the present.
This was a socio-political conflict with a religious dimension and this article specifically talks about the historical aspect (it IS from the History channel), so do look at this aspect.