This is what I was about to write : "100 hands isn't a big enough sample for me to be sure his range is only sets, and nits spazz sometimes. I'm snapping here but I'm a station fwiw".

Then I relooked the hand over, and he pretty much has a set 99.3% of the time here. So yeah, fold now. If he had raised flop smaller or bigger I'd probably snap this if that makes sense.