Many, if not most, of the members here have been turning wrenches on these cars since they were new. Many of them have worked in tough, industrial settings their entire lives, been through extreme hardships, and even been to war. To write a post telling them that you're ashamed of them because you didn't get the warm hugs you were expecting is arrogant and belittling. I honestly don't think you should be surprised at all that you came to a Mopar forum wanting to swap in a GM motor and got a little backlash.
Now, I agree that you should do whatever makes your heart happy with the car. Come up with a plan, do research, and execute. But if (and when) people disagree with you, don't take it personally. They might be disagreeing for a reason...
