Well. . . .
Maybe it would have been suicidal, maybe not. A jet fighter could knock the tail or wing off of a jetliner without killing the fighter's pilot. Closing rates could be 50 to 100 mph, maybe less. A pilot could then eject safely.
During WWII Russian pilots occasionally resorted to ramming to destroy German planes, then bailed out. They would ram the tail of the German plane, or chew up the tail with the prop. There was a novel by Hank Searls written in the 1950s or 1960s called The Crowded Sky. It dealt with a head-on midair collision between a USAF jet trainer and an airliner. At an early point in the novel the pilot is telling an airman getting a lift in the second seat how another pilot crashed head-on into an airliner and lived (he pulled up, and let the top of the airliner crash into the belly of the fighter). Of course the crisis of the novel dealt with whether the jet pilot would dive under the commercial airliner, guaranteeing his own death, but increasing the chances that the passengers would survive, or pull up over the airliner so he would survive while killing the crew of the airliner, and guaranteeing everyone aboard would die. Similarly, any USAF fighter could collide with the crew cabin of a jetliner (possibly with a wing) then punch out.
Normally that is lousy tactics because you are trading one airplane for another, even if you save the crew, however in this case, it would have been worth it.