If it's a 2 lane per side road the best way to get them to pass you is to not break check them but just take your foot off the gas until they get frustrated enough to just go around but this contextually sounds like a single lane sitch which you are correct is dangerous.
I'm a school bus driver and the course material (and test questions) for the CDL state this explicitly. If someone is tailgating you, you slow down. Tailgaters are gonna tailgate no matter what, and slowing down means the damage will be less if they do happen to hit you. If that makes them mad tough tittie (the course material does not use "tough tittie" but you can tell they wanted to).
The great irony of people who tailgate school buses is that WE CAN'T EVEN FUCKING SEE YOU BACK THERE. Even in your fantasy world of the person in front of you feeling pressured and speeding up (which never ever actually happens), it can't possibly happen if they don't even know you're there.
Pretty fucking dumb but it's a low bar. The only upside to tailgating a larger vehicle like a bus is that our stopping distance is a lot greater so the tailgater is less likely to slam into us.
Just let them go, because they are eventually gonna crash into a cop car and then you'll see the grest confrontation between fascist pig vs unhinged sov-cit in real time, great show!
people in my region have been shot at for flashing their lights at someone to tell them their lights were off. that's why i think escalating a scenario where one or both of you are wielding/controlling deadly weapons/machinery is the only way to go.