The issue is that he ignored those concerns when he decided to release the Nunes memo. He then went about grandstanding about how they (he) caught the Dems red-handed in making up everything about the Russian investigation and that everything was a hoax, despite the fact that the memo didn't say any of that. It just suggested that the Dems may have been less than forthcoming about how they applied for FISA warrants and continued pushing the narrative that the Dems fully funded the Steele Dossier so that also can't be credible.
So security concerns aren't important for a memo he THINKS (and I emphasize thinks because remember, he didn't actually read the memo) absolves him of any wrong-doing meanwhile he claims to suddenly have grave concerns about security threats when the counter-memo is on his desk.
He lost his benefit of the doubt on this particular issue weeks ago.
On one hand, you are 100% right about Trump. But Wray and the DoJ are the ones voicing concern here, not just Trump.