If you want to know a proper perspective, watch this informative 30 minute video by a leading American-Muslim scholar on the Paris shooting:
https://www.youtube.com/watch?v=SzP8e9b_OT8I agree with a lot of what he said.
I took the time to watch this. Here's a partial summary with a few points thrown in. It's of a Muslim dude preaching against killing cartoonists. It's in English but with some Arabic thrown in. (The first minute or so is in Arabic.)
He claims to be equally offended by cartoonists and murderers (6:13 - 7:00). That's better than a lot of Muslims. I personally find murderers more offensive than cartoonists.
He then (7:07 - 9:40) talks about the case of Ka'b ibn al-Ashraf, a poet at the time of Mohammed. Dude talks about how Ka'b wrote not only verses against Mohammed, but also dirty verses about the Muslim women. Finally Mohammed says, "Who will rid me of Ka'b?" and then he was killed. Dude is like, no, the real reason Muslims killed Ka'b was not because he was a poet writing dirty verses about that 9-year old Mohammed was fucking, but actually because Ka'b tried to kill Mohammed (multiple times!). I found more at Wikipedia:
https://en.wikipedia.org/wiki/Ka%27b_ibn_al-AshrafFollowing the victory of the Muslims over the Quraysh in the Battle of Badr, in March 624, Ka'b was angry at the execution of a number of Meccan notables who had been captured after that battle.[4] Ibn Hisham's biography of Muhammad reports Ka'b as saying "By Allah, if Muhammad has indeed struck down those people, then it were better to be buried in the earth than to walk upon it!"[5]
Ka'b went to Mecca, where he wrote poems praising the Quraysh and trying to incite them to again take up arms again against Muhammad.[2] Some sources suggest that during a visit to Mecca, Ka'b concluded a treaty with Abu Sufyan, stipulating cooperation between the Quraysh and Jews against Muhammad.[6]
Upon returning to Medina, Ka'b started a fresh campaign that took the form of obscene songs and erotic poems with a view to defaming the Muslim women.[5]
Muhammad made it clear to his companions that he wished Ka'b killed, saying, "Who is willing to kill Ka’b bin Al-Ashraf who has hurt Allah and His Apostle?"[7] Muhammad bin Maslama volunteered and was aided by several others, including Abu Na'ila (Silkan bin Salama, Ka‘b’s foster brother). Ibn Maslamah was troubled that this assassination would involve lying to Ka'b, but Muhammad gave him a dispensation to do so.[5]
They took Ka'b out for a walk late at night and killed him.[4]
To the dude's credit he makes the point that people who interpret this story as kill-those-who-insult Muslims are stupid (11:29). That is the kind of things Muslims need to hear from other Muslims. We non-Muslims can tell them they're stupid all we want, but that just seems to make them more stupid.
As part of that point he says Mohammed was insulted many times to his face and never stopped smiling. I'm not sure how true that is, but it would make an interesting cartoon.
Then he talks about how Muslims are right to be offended by cartoons and seems to be against free speech. It's not clear what he thinks Muslims should do against people who criticize Islam/Mohammed, but it's clear he neither accepts killing the cartoonists nor accepting the cartoonists.
At around 14:35 he asks "Why do people insult Islam?" (16:00) Look in the mirror. Back in Mohammed's time he says people mocked Islam as a tactic to try to stop the spread of Islam, because it called for justice and shit. That's not the case now. Now Islam is being mocked because of what Muslims are doing today. They're corrupt and bad and stuff. (18:40) "What are you going to quote now? What have we done? What have we produced as a people? How have we contributed to the world? The only time we make it on the news is when we blow something up." He argues Western Muslims have low moral standards. Muslims have to transform themselves. This seems to be the main point. In short, pay your taxes and give to charity.
(24:30) He says Muslims shouldn't try to convince non-Muslims they're not crazy because non-Muslims will think they're crazy no matter what. (I can confirm this. The only time I start thinking a Muslim isn't crazy is when they stop believing crazy shit, which means they're an ex-Muslim.)
Then he goes on to talk about how Muslims are great because they believe in reason, intelligence and justice. Or something. Muslims don't need swords, their best weapons are words and stuff. Islam is open-minded and encourages dialogue, but Muslims today are too closed-minded.
All in all, I can say this video is J.J.-endorsed. If Muslims were like this guy, I wouldn't think they were a bunch of violent lunatics. In other words, my guess is that this dude will be beheaded.