Welcome to the board. I hope you find your stay here beneficial.
Regarding your question, ask yourself who benefits from the idea the all religions besides JWs are evil, and that anyone that looks into them is commiting an unforgivable sin. The Watchtower is a real pro at dissing their competition. That position comes from one of insecurity, in my opinion. But that's just my view. You can try a few churches yourself and draw your own conclusions.
The WT has constructed a mental prison for you with that doctrine. You have a right to be free. And if you do decide to go back to the WT, it will be your choice, not theirs. Isn't that what Jehovah would want for you? Why would He want followers who believe because they have a gun to their head and are afraid of thinking for themselves? Is that the kind of followers you would want if you were God? Don't all parties involved deserve better than that?
Best wishes to you on what ever decision you make.