I do think you have a point that encountering a lot of anti-male sentiment will alienate some men and drive them towards alt-right anti-female groups.

The same mechanism can probably explain why encountering a lot of anti-female sentiment will alienate some women and drive them towards anti-male groups

Both these things are understandable but bad. If you’re actually in favour of equality, you should probably call out both these extremes. Don’t excuse men OR women for having extreme and destructive views.