The hate speech laws are in conflict with free speech. If free speech was protected by our constitution in the same way as it is in the USA, our hate speech laws would be unconstitutional.
If it's illegal to mock a long dead semi mythical figure who decided to spread his religious ideas by means of violence, then the hate speech law goes too far.
I think that's a very simplistic assertion about the spread of Islam. As with most history you can't usually sum it up in simplistic terms...unless you're Trump or Vote Leave.
The French people and those of many other countries are divided on the idea of free speech - it generates a lot of public debate. Back in 2008, a left-wing cartoonist, Sine, was fired from Charlie Hebdo because he was accused of anti-Semitism and refused to apologise. He was then charged with inciting racial hatred, found not guilty and then the courts ordered Charlie Hebdo to pay Sine EUR 90,000 for wrongful dismissal.
France has a law making it illegal to denigrate the French flag - so that's a limit on freedom of expression - some symbols off limits while others are fair game. The debate is not simple.