@DGRossetti Really? But you have seen Christians 'forcing' their beliefs upon people? Can you give examples?
Over the past 1,000 years ... well burning Catholics or Protestants depending whether there was a "y" in the Monarchs name immediately springs to mind.
Or the exclusion of Catholics from various jobs and offices up until the 1800s ?
Since this is AIBU, I was responding to the poster noting that the UK seems intractably able to mock Christianity, but not other religions. I was simply suggesting one possible reason why that is.
If you want to go further, then I tend to agree with the people who note that if you want to be able to make jokes about something, you really need a shared dataset around which to do so. The general lack of knowledge in the UK about Islam, Hinduism, or any other non-Christian religion amongst the vast majority precludes such humorous discussion. Instead it tends towards (as noted upthread) racism, abuse, and nastiness.
Besides, there are Jewish and Muslim jokes and comedians out there who are quite comfortable poking fun at their own religion. Tez Ilyas springs to mind, who's currently doing a fun series of podcasts for the BBC about being a British Muslim ....