Fundamentalists/Extremists/Terrorists
3 Words that make you think of Muslims eh?
If a Muslim shot a man on his way to church he'd probably come under all 3 words in the media, if he shot a well known and respected doctor, even worse!
However, if you live in the US, and it is a Christian that does it your are an 'Activist'!!! News
No you're not an Activist you are a Christian Fundamentalist/Christian Extremist/Christian Terrorist, as he murdered in the name of his beliefs.
You can't have different rules for different beliefs.