Wrong.
Going after MS is merely easier--that's why there's so many Windows attacks.
It like the difference between robbing people on the street or robbing a bank. You get more money robbing the bank (Linux), but it's a heck of a lot more secure.
Disagree. The number of users and potential financial gain from the millions of MS and Apple users who may not be updated, if that even helps due to holes in the s/w, opens the door for far more opportunities than the small number of Linux users. Turn the tables, if Linux was the dominant OS, hacking would be far more prevalent in linux users than the smaller number of MS and Apple users due to the larger number of apps written for the big gorilla. More apps = more avenues for hacking.