I have to think those who claim those Nephilim were simply bulies or tyrants failed basic English reading comprehension.
Gen 6:1-4
6 And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2 That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.
3 And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
4 There were giants (Nephilim) in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
KJV
That event is also recorded in the Book of Jude, and by Apostle Peter...
Jude 6-7
6 And the angels which kept not their first estate, but left their own habitation, He hath reserved in everlasting chains under darkness unto the judgment of the great day.
7 Even as Sodom and Gomorrha, and the cities about them in like manner, giving themselves over to fornication, and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire.
KJV
2 Peter 2:4-5
4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
5 And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly;
KJV
(It's sad that I am forced to directly show the KJV Scripture on that event of those fallen angels mating with the flesh daughters of men to produce a hybrid giant race, because of those who want to try and change... what that Scripture says in the manuscripts.)
Even in the Genesis 6:9 verse about Noah, it shows that Noah was "perfect in his generations", which that word 'perfect' in the Hebrew means 'without blemish' physically of the flesh, the same word used for the required sacrificial flesh purity of animals sacrificed per the old covenant. That reveals that Noah had not MIXED with those Nephilim. So it's IMPOSSIBLE the matter was simply about a bully or tyrant.