It’s very naïve of people to say that Linux doesn’t have any security issues, viruses or malware. I use Linux because it’s free, it’s free, and I prefer it over Windows. But Linux is not this perfect operating system that a fair proportion of Linux users profess, and it’s often bloody-mindedness and a misplaced form of elitist superiority that leads some Linux users to believe that Windows (and subsequently Windows users) to be lower than them.
Interestingly enough, the same effect exists in the argument between Internet Explorer and Firefox.
Freedom is the primary ethos behind Linux and Open Source software in general... and that includes freedom of use as well as freedom of choice.
Linux may be small in terms of desktop market share (less than 1%), but it certainly isn’t small in terms of usability or maturity.
Make your own choice.