He probably would stay away from the gay issue unless that was brought up by Charles, but he's also point out that Magneto...sometimes is...less of a supervillain? (Every time you die he joins the X-Men to carry on your dream!) And that maybe Camp would be a good chance to work out whatever's going on between you? Before anything extreme like "The Brotherhood of Evil Mutants" happens. Mostly he would just...be there and tell Charles it's okay every once in a while.

Just like he did for Xavier's great-great-great-great-etc uncle.

What is Xavier's reaction to there being bunches of different mutants in bunches of different universes?