Your question is a fair one.
It is absolutely fair to point out that anyone who disagrees, or even has evidence that points out that JW's have been wrong, or more to the point, have never been right, is from the devil.
This is a TOTALLY fair thing to ask.
To answer your question directly then: No
I am not from the devil. Most people who leave JW's are not either.
Here is a great little definition, followed by a very fair question in response:
[ uh - pos -teyt , -tit ]
Show IPA noun 1. a person who forsakes his religion, cause, party, etc.
Isn't it ironic to any JW that the primary work that the Governing Body assigns them to do is to make apostates out of people of all nations?
I mean, you can't be baptized a JW unless you write a letter of resignation to any church or religion you may have been a part of.
JW's as such are a religion of apostates, people who have forsaken their former religion.
Can a former JW be blamed for investigating the JW faith in a way that JW's want Catholics to look at their faith with a critical eye?