Pray tell, how does Oswald leaving his wedding ring in a cup, after Marina basically left him with the impression that his marriage was over, become direct evidence with a causality to a murder?
Or even worse, how can getting [off] a bus or not being chatty with a taxi driver reasonably be connected to a murder that has already happened[?]
You'll never be able to figure out that the things you just highlighted in your post above are indeed relevant because you continue to
ISOLATE every single thing Oswald did instead of
ADDING THOSE THINGS TOGETHER.
Martin must be related to an ultra-rabid conspiracy clown named Ben Holmes, because in dozens of past Internet exchanges, I was constantly having to remind Holmes to "add things up" as well. [See the link below.]

For some reason, JFKA CTers just refuse to
add together all of the various out-of-the-ordinary things that Lee Harvey Oswald did on November 21 and 22, 1963.
When added together (
as a unit!), Oswald's unusual movements and actions on those two days in November most certainly paint an incriminating picture when examined through a post-assassination lens. Most conspiracy theorists
know this already, of course. They just don't want to admit what such a simple act of "addition" actually reveals.