Pakistan was not proscribed; just had some kind of advisory against, but was not prohibited. That was debated years ago on the research threads. A lot of your comment is based on the assumption that his “autobiography” is actually the truth, which is a mistake.
Ebola did not mention his trip to Pakistan in his "autobiography" which is one of the strange things... sort of the hound who did not bay in the night. Why not? His actual first mention of this trip was apparently in 2006 or 2008 depending on which story one believes.
Returning to that "autobiography," when the prose in that book was run through computers which are programed with software designed to determine authorship, it was found to most resemble writing by erstwhile urban terrorist William 'Bill' Ayers. In fact numerous instances of exact phrases and word pairings and usages were identified that matched earlier works written by Bill Ayers. In 2009, a visibly drunk Bill Ayers in an interview stated "I ghost-wrote 'Dreams From My Father'," later Ayers tried to pull back from that statement by claiming he was joking, speaking facetiously and sarcastically in response to the rightwing rumor mongers.
I'm of the opinion every thing about Omamba's life is a scripted fake, with props and actors provided for him including providing him with an artificial wife and family, doing what is necessary to make it look real.