You are free to believe what you will, but non-murdering Muslims are already calling out these lunatics who murdered people in France and thus would join that hypothetical march.
Secondly, there are Muslims who are quite Anglo-Saxon in appearance and would pass as a non-believer from any religion, or would pass as a Christian in that hypothetical march.
So what would be keeping non-murdering Muslims and Christians temporarily suspending their dislike for things that lampoon their own faith and then with that temporary suspension in place just march for free speech rights?
Believe what you will, but Muslims believe that the entire world will be Muslim some day, that be through force, matters not to them!!
Islam is a governing mechanism, with a splash of religion thrown in for good measure. It is the world’s largest CULT!
I know Muslims, I have friends who are Muslim and they tell me they are afraid of the “lunatic, radical left” within their “religion” because they know what the ultimate goal is for the cult.
I believe Christians can and DO already participate in marches for free speech, even for those whom they disagree. But Muslims? No, never, period.