Once you understand the principles Ghamidi Sahab is trying to explain, these questions become moot.

The absolute prohibition is that of Shirk/polytheism, the rest is up to one’s own sensitivity to His belief system and to Polytheistic attitudes. Ghamidi Sahab personally do not even give advice on getting married with Ahl-e-Kitaab women, but it cannot be declared completely haram. With intersect marriages, at least the other party is not claiming to be a non-muslim, so threshold becomes low from a legal stand-point.

That depends on who is “We”?

Because according to me, there are other sects of Muslims who claim to be Muslims as well, but I know of their polytheistic beliefs and would never have any marital relationships with a woman of those particular sects.

So its a very subjective thing, one could be legally a Muslim but not from a practical standpoint and vice versa. It comes down to your own assessment of things and to your own sensitivity towards certain religious core-beliefs. Nothing explicit has been said by religion in this matter, except for Prohibition of Marriage with a declared Mushrik (polytheist).