It's interesting but it ignores one key point.
If I remember Sutton correctly, his books were printed in the 1970s, the shaping of his views,are lodged strongly in the post war Macarthyism/Cold War arena. Within that view he can argue that American business did a fair amount of business with the Bolshevik Government post WW1, and from the post WW2
viewpoint, this would be seen in a negative light, especially if you were working for The Hoover Institute at the time. What has to be remembered is towards the end of WW1 Bolshevism was not the enemy. For Britain especially, Turkey remained the major focus of intrigue right through to the 1920s, with us sponsoring disastrous Greek adventures against the Turkish mainland. At the same time, Turkey and the Red Army were engaged in conflict in The Caucasus. The West was definitely not backing Turkey at the time.
Some other considerations -
His comments about the state of Russian Industry are amusing. If Russian industry was so advanced prior to WW1, how come they were defeated by the Japanese prior to the outbreak of WW1, and then completely lacked the material and organisation to take on the Central Powers on their secondary front.
Why wasn't Trotsky's journey interrupted by the British, On what grounds? He was not an enemy alien, and, once again there is a element of bringing modern cold war thinking to the table. Trotsky may have been a bit of a shady cove, but that was not enough to detain him at the time. The British didn't do that sort of thing then.
paint your wagons and burn your banker, coz the twisted circus is coming to town and there ain't no safety net under the high wire.
- Larry Love.