This is from a recent paper that has a single citation insofar in Google Scholar, so don't take it as the ultimate word on the issue, but it found that
using a nationally representative data set with information about communities, social networks, and individual-level variables, this paper examines social connectedness and political behavior. Those who are more socially isolated, it is found, are neither more conservative nor liberal on any particular political issues, but clearly participate in politics less than individuals who are well connected to those around them. Finally, while individual political ideology is not correlated with isolation, the contextual influence of the local environment on individual preferences is correlated with social connectedness. When compared with well connected citizens, individuals who are more isolated are less likely to have their vote choices influenced by those around them. Individual social connectedness conditions the effect of contextual social influence.
There are, however, significant differences when it comes to participatory political behavior: socially disconnected individuals are much less likely to participate in politics through voting, campaign donations, or talking about politics with others.
What is most notable about these data is that participation in political activities appears to vary more with social connectedness than political attitudes. Within core behavior, only turnout appears to change (and grow) with network size; partisanship and ideology do not. Support for – or opposition to – various political positions does not generally appear to vary greatly by level of social connection. In contrast, participation in politics appears to vary significantly across levels of social connection. For instance, while only 24% of individuals who reported no or only one important connection tried to influence someone else’s vote, a full 62% of individuals who listed five important connections attempted to influence another’s vote.
From that graph, it's possible that with a larger sample there might be a statistically significant effect of disconnectedness with ideology, but the effect size is going to be small.
So it doesn't look like there's much to said here, at least in the US:
social disconnectedness didn't correlate with ideology in a significant way
those more socially isolated were however less likely to follow the ideology of their few social contacts
they are also less likely to be politically active, both in a conventional sense (voting etc.) but also in the private interactions of those with whom they do have contacts with, i.e. they don't try to act much as political influencers in private either.