Why would I be forced to murder myself in an alternate universe by existing in it simultaneously?

Since I cannot travel to a universe where my alternate self is dead, what happens after they die in their universe if I cannot exist in it without them?

Did you recently watch “The One”?

Cocaine.

Does this forget that intrusive thoughts exist for everyone and generally most people would assume it was just that?

Having read through the other comments I think this is the winner. This person needs to read a book. What a wild hill to die on.