Surely, by now you must have noticed that both Biden and Trump, like a lot of Americans, are not at all hesitant about mentioning God, prayers, etc.?
Whether this is because the genuinely believe in God, or is solely because it is still the done thing in certain circles in America to let everyone know you believe in God, I have no idea.
Trump presumably belongs to the school who think God is an American, and as Trump has never evinced the slightest display of empathy for anyone, it can hardly come as a surprise that he has neither condoled with the bereaved, or even mentioned the fact that although he was only superficially hurt, others were seriously injured or killed.
And are you all certain that the 20 year old shot for being the shooter really was the person who took that shot?
If the shot was fired from where the FBI claim the shooter must have been a very good marksman indeed, which no-one has yet said he was.