E6000 and Goop will work. . . Are you roughing up the back of the glass? And the bail?
I generally rough up the back of the glass with my Dremel as well as the bail. I use a toothpick to spread the glue into the roughed up surface of the glass and then put the bail on. I also “cure” the glue in my toaster oven (although I guess you could use an oven) at 300 degrees for 20 minutes to a half hour.
I’ve found that roughing the surface, using a small amount of glue rather than a big glob, and heat curing the glue work well. Yes, someone can probably use a hammer and knock the bail off, but my bails stick. I wait at least 24-hours before I test the bail.
If that doesn’t work for you, you might try Triolyse Adhesive (which is more expensive than E6000)
or G-S hypo. Some people have also gone with a 2-part epoxy, but E6000 can work.