Really?
The pardon is not the issue. The issue is using the White House as a prop for completely political purposes. And apparently, at least two of the people in the naturalization ceremony weren't even told, never mind asked permission, to be used as human political props during the RNC.
And please - Israel is not the issue. Are you suggesting that I have an issue with Israel, and somehow, that I would mention Israel as a reason for Pompeo's action to be indictable? Roll eyes indeed. Try thinking first.
The secretary of state, while in a foreign country, made a political speech. You can argue about the legality of it (although in a legal memo distributed to all state department employees, the following line was actually bolded: "Senate-confirmed Presidential appointees may not even attend a political party convention or convention-related event".) You can quibble about what the word "attend" means, but the intent is absolutely clear. For further evidence of what is considered acceptable, the rules concerning U.S. diplomats outside the United States are more restrictive than for those on US territory: state department diplomats - so long as a) they are not senate appointed presidential appointees and b) they are in the United States proper, and c) they only attend as spectators - are allowed to attend a "political party convention or convention-related event", "a partisan political rally, fundraising function, election party, meet-the-candidate event, or other political gathering as a spectator."
Again the intent is absolutely clear, and there is also a general understanding and tradition that State Department diplomats, especially internationally, shun displaying domestic political preferences in order for the country to speak with a single voice to other countries.
That you didn't immediately see this issue is emblematic of the problem to which I was earlier referring.