It isn’t a matter of accepting either of them but at the heart is the rejection of the idea that one is justified in killing because of an offensive cartoon or piece of art something that Islamists are prone to do.
No terrorism in any form is acceptable.
But will non-violent Muslims ever accept a march like this along with non-violent Christians (which almost all are) and both sides suspending some dislike in the name of free speech.
Can people (be it Christians, Muslims, Buddhists, etc) put all religion aside temporarily in the name of free speech?