I am no authority but i would put my money on dodgy forks before blaming a rear tyre.
Understand the confidence thing. Only you will know if you want to hop on again but if the RE was your first bike after a long layoff i would strongly advise to try some others. I really like the 250s they are light and easy if a bit tall. Ride a KLR before you buy one. They are a big bike.
Good luck mate. Get well soon.