Israel has a right to defend itself. What Israel does not, in my view, have a right to do is to kill thousands and thousands of innocent men, women, and children who had nothing to do with that attack.
As a younger person on the political left, I've seen a lot of Trump's comments on the military, but I haven't seen any specifics for the Obama stuff. Would you be willing to provide a few examples? Thanks!
The sequestration debacle is the most clear and evident example; it was an action that hurt a significant number of active-duty folks. It wasn't solely his baby (both parties deserve blame), but his directive to focus so much of the cuts on defense without utilizing his influence as commander-in-chief to direct cuts to soften the blow or direct Congress to pre-emptively address it was something uniquely attributable to him (after all, a funding bill for tuition assistance passed with bipartisan support afterwards). Anyone who says "you should blame the services, they decided what was cut," doesn't really understand how cuts work. When a cut is coming, all organizations, not just the military, prefer to cut funding for programs that have funds to be disbursed in the future, rather than active programs that would require significant effort to reassign personnel or facilities, because it's less impactful to cut a program that don't have fixed costs. When that deal was made, it was made either with the knowledge that tuition assistance would be a program on the chopping block or made with such reckless disregard that ignorance would not be a defense.
When they occurred, a lot of cuts came to tuition assistance; junior enlisted felt the struggle most of all when they became on-the-hook for significant secondary education expenses. The lack of concern that he expressed during it, and the lack of support (or even acknowledgement) he gave after-the-fact, was very much a slap in the face. "You have suffered because of something I did, and I won't even deign to acknowledge it," is very much an expression of contempt.