You are confusing invalid deductive arguments with logical fallacies.
Not quite, it's pretty much the definition of "logical fallacy".
For instance, inductive reasoning is not fallacious. If one sees many swans, all of which are white, one is correct to conclude that it is probably the case that all swans are white. Of course, it may not be the case.
That's what we have statistics or probabilistic reasoning for. But let's remember that your argument for believing the US government/intelligence isn't based on statistics.
Similarly, if I have good reason to believe that A is an authority on X and good reason to believe that A is trustworthy regarding X, then A's saying that X is good reason to believe that X is probably true. It is not the case that X could not be false, but we're talking about a form of inductive reasoning here.
Again, if that were the case then you have to provide us with estimates of likelihoods. Specifically, let E be "the US government & intelligence services say X is true" and H be "X is true", then you should provide us with P(E | H) and P(E | ~H).
Your claims about appeal to authority would apply to Hannibal as well.
True but irrelevant for the reason stated earlier. Even if someone accepts certain claims based on certain authorities doesn't mean someone should accept all claims based on all purported authorities.
No, I trust that what these different intelligence agencies say is likely to be true, partly because of their agreement with one another and because they are likely to have methods for determining the truth.
They also have methods for spreading disinformation and are known for their persistent use of such.
Moreover, they have shared their evidence with a bipartisan group of congressmen, all of whom treat it seriously.
Well, let's take a look at the pieces of evidence we have been given. First, some IP addresses which were used, which are Tor exit nodes. The basis for connecting this with Russia is that Russia is "associated" with these IP addresses. What it fails to mention is that
everyone who tries to hide their identity on the internet is associated with Tor exit node IP addresses.
Suppose I walk up to a group of senators and provide them with the following evidence:
1. List of IP addresses used in hacking/phishing events.
2. Earlier recorded use of these IP addresses by Russia.
And of course I stay silent about everyone else also using these IP addresses. You think I could convince a bunch of random senators that these 2 pieces of information constitute evidence for associating the hacking/phishing events with Russia? I bet I could.
Of course, I must admit that it is possible my conclusion is in error, but I am nonetheless persuaded that it is probable.
Then argue your case based on a sound and empirical basis rather than an ideological one. Otherwise I don't see how you could expect other people to adopt that persuasion.