I bet you can also. I’m guessing there are three main reasons:
Giving females male hormones including but not limited to testosterone causes a spike in aggressive ideation, including murder. Males have years while in smaller weaker bodies to learn to come to grips with the murder thoughts. I think it was Freud who said that if a two year boy could, he would murder the world. A female to male trans might not have the time with these thoughts and be able to just get guns and spray 143 bullets in nine minutes and not realize that isn’t a great idea.
Propaganda for trans to murder non-trans that has persuasive elements, probably because it refers to the historically lopsided murders of gays throughout the last few thousand years, especially by the Catholic Church.
Detailed blueprints for what weapons to purchase, how to learn to shoot, and how to conduct mass murder. Testosterone supplementation also increases focus and the equivalent of IQ, possibly making these blueprints more clear than those plans published heretofore.
The fear on the part of the FBI is that publication of the above will cause churches and religious schools (which educate over 10% of all students) to armor up and hire armed guards, and some of non-trans who own the vast majority of the 400 million firearms in the USA to seek to pre-empt the emergence of female to male transition in teenagers.
If you think I’m wrong about any of these points, tell me what you think is in these REDRUM journals instead of what I am guessing.