Highlights include the Pogram of 1926 CE and the Holocaust in 1945, each of which killed more Jews than were killed in 70 CE.
All your assumptions are based on sheer numbers.
Which of the following is a greater tribulation:
1) A mother roasts her 2 year old daughter, then eats the daughter to keep from starving to death.
2) 10 men are executed by a firing squad
Also, 70AD marked the end of the old covenant, the end of the Temple, the end of the Mosaic Law, the end of the ages.
What could be greater than an end to these things?
No event since has had a greater effect on human history than what happened in 70AD