no, not at all. i did not criticize anybody, nor did i say their argument was invalid because they're somehow worthy of criticism. that's the requirement for an ad-hominem, i just threw in the "quote" to illustrate how bandwagons work. in other words, there's an opportunity for political muck-racking, and everyone else is doing it, so let's get on board. even commissar just said he normally doesn't care.
I'd consider it borderline, myself. Personally, I see your calling my disagreement with "under God" or "In God We Trust" as an ad-hominem attack, as if you're questioning my credibility. I see it as you saying "you don't care about this issue, you just want to shake up the right wing!" This is entirely untrue.
Yes, I tend to agree with you in most debates in fact. People color me conservative, so I've just adopted it as what people consider conservative. Whether it is or not.
I don't find it meaningless, at the same time I don't think it is anywhere near a matter of importance. I don't think the Supreme Court considers it so either, the media circus surrounding it created the hysteria more than anything.