Why not read Earth Not a Globe to find out?
Because in the many threads on this site, as well as others, ENAG has been proven wrong.
On why the sun does not change size, we have created this article to supplement ENAG's explanation: https://wiki.tfes.org/Magnification_of_the_Sun_at_Sunset
Your argument relies heavily on lens flare in images, though, not the divergence of light. There is also a large difference between a few hundred feet, as seen with street lamps, and the sun, which, according to you, is many thousands of miles away (even further at sunsets and sunrises). What math have you done to determine that it really is the divergence of light that causes the sun to appear the same size?
On why the sun does not act as if the perspective lines meet an infinite distance away, this is discussed in Earth Not a Globe. The perspective lines actually meet a finite distance away
Then I should be able to take a telescope, point it at the sun after it sets, and see it again.
As an example, a long length of straight rail road tracks will ascend to eye level
Tracks do not ascend to eye level, nor does the horizon. If tracks are longer than how far you can see to the horizon, then the tracks will appear to meet the horizon. Most images of straight tracks are also taken very close to the ground, meaning you can't see as far as if you were standing straight up. Many rail tracks run for miles, so they will meet the horizon.
The horizon does not ascend to eye level, as you claimed here:
The ground beneath you rises to eye level.
watch:
The higher you go, the lower the horizon drops. This is measurable.