To be honest life was "easier" 30 or 40 years ago in all areas, not just multiculturalism (I am not saying it was better just easier).
For example a number of channels on TV show old shows like Porridge, the Two Ronnies and so on, and it is amazing how many things happen, or are said, that would have the "PC" brigade up in arms nowadays.
In fact some of these shows are now censored, often for the most trivial things, and if I watch an old Porridge for example there are scenes and lines that have now been cut that I know were in the original show.
I saw a Porridge the other day where the script writers had set up a lovely scene ready for a great punch line from Ronnie Barker, but while they had left the whole scene in, they had deleted the punchline at the end rendering the rest of the scene pointless.
Also Gold have been repeating the Two Ronnies and it is amazing how often a sexy busty girl is brought on so that one or other (or both) of the Ronnies can leer at her (usually her boobs or backside).
In fact I know that Beny Hill gets a lot of criticism about his treatment of women, but many TV shows did the same thing back then, even Monty Python has a few scenes where girls are just shown for their "sexy" effect.
People (mostly men) just did not know how to "write" for women back then.
Now I know that some of these scripts do contain many words and phrases that are not used nowadays, and it is probably right that they are removed.
However it just goes to prove my point that life was a lot "easier" then than it is now (even if some minority groups were made fun of).
So it is not just multiculturalism that has made life "harder"