Respect depends on the person. The left is a very fractured, probably the most fractured ideology spanning from Stalinists to Leninistss to Trotskists to Syndicalists to Libertarian Socialists to Anarcho-Communists and dozens and dozens more smaller groups of thought. But in the end we all want the same thing more or less but have very different ideas of how to get there. Leninist, as I understand, want a vanguard party to seize control for the proletariat and set up a government bureacracy to lead the state into communism and will eventually fade away as it is no longer needed. But the anarchists area wants an immediate dissolution of the state and a creation of a horizontal power structure in different community groups. And for your question about if anarchism can work look at Revolutionary Catalonia who took part in the Spanish Civil War and was quite successful until it was destroyed by Franco's army since the Republicans could not save it from encirclement. (It is debated but I believe part of the fall of this society was the Spanish Communist Party who was supported by the Soviet Union did not truly support a proletariat revolution and was against the anarchist) Also the Free Territory which was in Ukraine during the Russian Revolution but was then destroyed by the Bolsheviks as they consolidated power in Russia. So historically no the two areas of the far left have not had much respect for one another (also anarchists were expelled from the first international) but if we want today to build a society we will have to have respect for one another since we both stand against capitalism and emancipating the worker is more important than killing each other. And in this subreddit I feel there has been more respect between the more authoritarian and libertarian sections of the left but conflict still exists. Hope this helped