You're not very well read are you?
Care to enlighten us on these Christians blowing up people in the name of God. Are they Catholics?, Baptist?, Methodist?, Presbyterian? Mormon?, etc.
The only one to come to mind is the IRA, however, as you are probably aware, that was confined to Great Britain and rooted in the late medieval period when Henry VIII kicked the Catholic Church out and started the Church of England and the subsequent growth of the Protestant denominations. The forced settlement of non-Irish into Ulster led to the religious discord lasting into twentieth century.
The emergence from the dark ages was the enlightenment of the Judeo-Christian values and morality of Europe. Europe evolved beyond the Inquisition, beyond persecution of witchcraft, at it's core level. While the almost nonstop wars between feudal states and nations would lead to barbaric acts during conflict, between combatants, the towns and cities were spared the medieval seiges (that changed with the bombardments of Charleston and Vicksburg in America). Europe in peacetime reach a point of civility, with Judeo-Christian morality of right and wrong. This was passed along to the American and Australian colonies.
All of that to address your Muslim concerns. Islam has elements that literally interpret the Quran as law. Kill the non-believer, kill the infidel isn't ambiguous. It is what it is. Moderate Muslim Imams do not generally preach this and the vast majority of Muslims do not act upon it. But many radicalized Muslims do act upon it, especially in the last fifteen years. Allahu
Akbar is spoken almost weekly in a terrorist attack against innocent civilians. Radicalized teaching and Sharia Law are completely and totally counter to western beliefs, ideals, and morals in place for hundreds of years. The United States is known as a melting pot of cultures and religions. Some Muslims, per their interpretation of the Quran, refuse to melt.
You lament about all Muslims being labelled terrorist. How, pray tell, do non-Muslims tell the difference between a moderate and a radicalized? There is no tatoo on their forehead saying "I'm radicalized".
It is incumbent on Moderate Muslims to take back their religion. Problem is many Moderates sympathize with the attacks because it is spelled out, literally, in the Quran. Until radicalized Muslims are pacified by fellow Muslims, or non-Muslims, or both, the term "terrorist attack" will be synonymous with "Muslim". Almost all recent attacks have justified this assertion.
Apologies for the long post.